μg microgram
ABCC8 gene localization for the sulfonylurea receptor 1
Abs antibodies
ACE angiotensin-converting enzyme
ACR albumin creatinine ratio
ADA American Diabetes Association
ADHD attention deficit/hyperactivity disorder
AER albumin excretion rate
AGA Working Group for Obesity/Arbeitsgemeinschaft für
Adipositas
AGPDA Working Group for Paediatric Diabetology/Arbeitsgemeinschaft für
Pädiatrische Diabetologie
AHCPR Agency for Health Care Policy and Research
AIHA autoimmune hemolytic anemia
ALT alanine transaminase=liver enzyme
APS Working Group for Paediatric Metabolic
Disorders/Arbeitsgemeinschaft für Pädiatrische
Stoffwechselstörungen
AT1
Angiotensin II receptor type 1
avg. average
AWMF German Association of the Scientific Medical Professional
Societies/Arbeitsgemeinschaft der wissenschaftlichen medizinischen
Fachgesellschaften
BABYDIAB German BabyDiab-Study (German baby diabetes study)
BAR Federal Working Group for Rehabilitation/Bundesarbeitsgemeinschaft
für Rehabilitation
BdKJ Association of Diabetic Children and Adolescents/Bund diabetischer Kinder und
Jugendlicher
BG blood glucose
BMI body mass index
BMI-SDS body mass index standard deviation score
BS blood sugar
BW body weight
c. a. condition after
C-peptide connecting peptide=part of proinsulin
CFRD cystic fibrosis-related diabetes
CGM continuous glucose monitoring
CK creatine kinase
CNS central nervous system
CSII continuous subcutaneous insulin injection=insulin pump
CT computer tomography
DAG German Obesity Society/Deutsche Adipositas Gesellschaft
DAISY Diabetes Autoimmunity Study of the Young (autoimmunity study for adolescents with
diabetes)
DCC-Trial Diabetes Control and Complications Trial (study on the control and
complications of diabetes)
DDG German Diabetes Society/Deutsche Diabetes Gesellschaft
DEND diabetes epilepsy and beurological delay (genetic syndrome with diabetes,
epilepsy and neurological developmental disorder)
DENIS German Nicotinamide Intervention Study/Deutsche
Nicotinamide-Intervention-Study
DEPS-R Diabetes Eating Problem Survey – Revised
DGE German Nutrition Society/Deutsche Gesellschaft für
Ernährung
DGEM German Society for Nutritional Medicine/Deutsche Gesellschaft
für Ernährungsmedizin
DGKJP German Society for Paediatric and Adolescent Psychiatry, Psychosomatics
and Psychotherapy/Deutsche Gesellschaft für Kinder- und
Jugendpsychiatrie, Psychosomatik und Psychotherapie
diab. diabetic
diabetesDEDiabetes Germany
DIAMYD Diamyd® Study
DIPPDiabetes Prediction and Prevention Project
DKA diabetic ketoacidosis
dl decilitre
DNSG Diabetes And Nutrition Study Group
DPT-1 Diabetes Prevention Trial – Type 1
DPM Diabetes patient management (documentation system)
EASD European Association for the Study of Diabetes
EDIC-Trial Epidemiology of Diabetes Interventions and Complications
Trial=Follow-up Study of the DCC Trial
EIF2AK3 Eukaryotic Translation Initiation Factor 2 Alpha Kinase 3 –
gene locus for mutations leading to a genetic syndrome with diabetes
EC evidence class (methodological quality of a study according to criteria of
evidence-based medicine)
ECG electrocardiogram
EMA European Medicines Agency
ENDIT European Nicotinamide Intervention Trial
ES educational support (therapeutic support in parenting)
esp. especially
ethn. ethnic
fam. familiar
FES family environment scale=scale for the evaluation of social
characteristics and the environment of families
FOXP3 forkhead box P3 – gene locus for mutations leading to genetic
syndromes with diabetes
FST-D family system therapy for patients with diabetes
fT3 free triiodothyronine
fT4 free thyroxine
g gram
GAD glutamate decarboxylase
GCK glucokinase
hhour
HbA1c glycated haemoglobin
HDL high-density lipoprotein
HHS hyperglycaemic hyperosmolar syndrome
HLA human leukocyte antigen
HNF hepatocyte nuclear factor
HTA health technology assessment=systematic assessment of medical
technologies, procedures aids and organizational structures, in which medical
services are provided
I.U. international unit(s)
i. m. intramuscular
IV intravenously
IA-2 tyrosine phosphatase IA-2 antibody
IAA insulin autoantibodies
ICAislet cell antibody
ICT intensified conventional therapy
IgA immunoglobulin A
IgG immunoglobulin G
INS insulin(s)
IPEX immunodysregulation polyendocrinopathy enteropathy X-linked syndrome
IPF-1 insulin promoter factor 1=gene locus with mutations leading to MODY-4
diabetes
IRMA intraretinal microvascular anomaly
ISPAD International Society for Paediatric and Adolescent Diabetes
ITP immune thrombocytopenic purpura
n/a not available
kcal kilocalories
KCNJ11inward-rectifier potassium ion channel, subfamily J, member 11
kgkilogram
Kir6.2major subunit of the ATP-sensitive K+ channel
KJHG child and youth welfare law
llitres
LDLlow-density lipoprotein
LGS low-glucose suspend
m2 square meters
max. maximum
mg milligram
micro microalbuminuria
min. minimum
MJ megajoules
ml millilitres
mm millimetres
mmHg millimetres of mercury=used to measure blood pressure
mmol millimole
mon month(s)
MODY maturity onset diabetes of the young (adult diabetes in
adolescents)=monogenetic diabetes
MRI magnetic resonance imaging
n number
NaCl sodium chloride
NDM neonatal diabetes mellitus
NCV nerve conduction velocity
NPH neutral protamine Hagedorn
NYHA New York Heart Association classification system for the severity of
heart failure
OGTT oral glucose tolerance test
p p-value/probability value – exceeding probability, statistical
information
PAL physical activity level (value for measuring the daily physical activity
expenditure)
Pat.patient(s)
pCO2 arterial partial pressure of carbon dioxide
pHpotentia hydrogenii (capacity of hydrogen)=negative logarithm of the
hydrogen ion concentration/activity, measure for acidity of a medium
PGAs polyglandular autoimmune syndromes
PLGM predictive low glucose management
PNDM permanent neonatal diabetes mellitus
RCT randomized controlled trial
RR Riva Rocci=arterial blood pressure, measured according to the method
of Riva Rocci
s. c. subcutaneous
SC standard care (standard treatment)
SEARCH search for diabetes in the youth study (studies for the identification of diabetes in
children and adolescents)
SGB Social Code (Sozialgesetzbuch)
SIGN Scottish Intercollegiate Guidelines Network
sign. significant
SSRIselective serotonin reuptake inhibitor
STIKO Standing Vaccination Commission of the Federal Republic of
Germany/Ständige Impfkommission der Bundesrepublik Deutschland
SaP sensor-augmented pump therapy
SUR 1 sulphonylurea receptor 1
SaT sensor-augmented insulin therapy
T3 triiodothyronine
T4 thyroxine
tTG tissue transglutaminase
Tg thyroglobulin
TNDM transient neonatal diabetes mellitus
TPO thyroid peroxidase
TSHR thyrotropin receptor
TRIGR Trial to Reduce IDDM in the Genetically at the Risk (Study on the
reduction of diabetes mellitus by immunodeficiency for genetical risks)
TSH thyroid-stimulating hormone/thyrotropin
U unit
UK United Kingdom
vs. versus
WHO World Health Organization
Yyears
ZnT8 zinc transporter 8
Causes and background
The improvement of the care of children and adolescents with diabetes mellitus is an
essential task of the Working Group for Paediatric
Diabetology/Arbeitsgeschaft für Pädiatrische Diabetologie
(AGPD).
In order to meet the needs of a chronic disease in childhood and adolescence,
specific aspects of this stage of life must be taken into account.
These guidelines are addressed to all professional groups that care for and support
children and adolescents with diabetes and their families, as well as to
higher-level organisations (e. g. health insurance companies) that are
involved with or affected by the disease.
In accordance with the specifications of the health ministers of the federal German
states as well as the current practice of many clinics, these paediatric guidelines
are valid until the age of up to 18 years. In individual clinical cases, however,
these guidelines can also be extended to apply to early adulthood.
Epidemiology and types of diabetes in childhood and adolescence
Epidemiology and types of diabetes in childhood and adolescence
Type 1 diabetes
Type 1 diabetes is still the most common metabolic disease in children. According
to current estimates, 15600 to 17400 children and adolescents aged 0–14
years live with type 1 diabetes in Germany [Rosenbauer et al. 2013]. At the
beginning of the millennium, 21000 to 24000 children and adolescents aged
0–19 years were affected [Rosenbauer et al. 2002]. This figure is
currently estimated at around 30000 to 32000 [Rosenbauer et al. 2012].
In the 1990s, average annual new illness rates (incidence rates) were reported
between 12.9 (95% confidence interval 12.4–13.4) and 14.2
(95% confidence interval 12.9–15.5) per 100000 children aged
0–14 years and 17.0 (95% confidence interval 15.2–18.8)
per 100000 children aged 0–19 years [Neu et al. 2001; Rosenbauer et al.
2002; Neu et al. 2008]. The incidence rate has increased by 3–4%
per year [Ehehalt et al. 2008; Neu et al. 2013]. Compared to the early 1990s,
the new illness rate for 0–14-year-olds has now doubled and is currently
22.9 (95% confidence interval 22.2–23.6). The increase in
incidence rates especially affects the younger age groups.
Type 2 diabetes
Parallel to the increase in the prevalence of excess weight and adiposity in
childhood and adolescence [Kurth and Schaffrath (2007); Kromeyer-Hauschild et
al. 2001], the incidence of type 2 diabetes has increased in this age group.
Initial population-based estimates of type 2 in children and adolesccents showed
an incidence of 1.57 per 100000 (95% confidence interval
0.98–2.42) [Rosenbauer et al. 2003]. Studies carried out in
Baden-Württemberg in 2004 showed that type 2 diabetes in Germany occurs
in 0 to 20-year-olds with a prevalence of 2.3 per 100000 [Neu et al. 2005]. A
second cross-sectional survey in Baden-Württemberg conducted in 2016
confirmed the relatively low and constant incidence of 2.4 per 100000 [Neu et
al. 2017].
Risk factors, prevention and early detection of diabetes
Risk factors, prevention and early detection of diabetes
According to the current guidelines of the International Pediatric Diabetes
Association/Internationalen Pädiatrischen Diabetesgesellschaft
ISPAD, the progression of type 1 diabetes has recently been divided into 4 stages
[Couper et al., (2018)]. Stage 1, the beginning of type 1 diabetes according to the
new classification, is when 2 or more diabetes-specific autoantibodies are
detectable but children and adolescents are completely asymptomatic. If glucose
tolerance is impaired, this corresponds to stage 2. Stage 1 and stage 2 can precede
months and years of clinical manifestation. Stage 3 is when there is a manifestation
and stage 4 is the case of a type 1 diabetic who has lived with the disease for some
time.
Measures to maintain beta cell function can start before the onset of islet
autoimmunity (early stage 1, primary prevention), after the development of
autoantibodies but before clinical symptoms (stages 1 and 2) or rapidly after the
manifestation of type 1 diabetes (stage 3). The progression of type 1 diabetes with
proven autoantibodies occurs more rapidly with seroconversion to islet autoimmunity
before the 3rd year of life and in children with an
HLA-DR3/DR4-DQ8 genotype [Ziegler et al., (2013)].
The 5 and 10-year risk of type 1 diabetes manifestation in children who show multiple
autoantibodies at the age of 5 years or earlier is 51 and 75%, respectively
[Danne et al., (2018)], German Health Report Diabetes/Dt. Gesundheitsbericht
Diabetes].
Type 1 diabetes
The diagnosis of type 1 diabetes is based on clinical symptoms and blood glucose
monitoring. In case of doubt, further parameters can be used for diagnosis.
These include:
-
Autoantibodies associated with diabetes (ICA, GAD65, IA-2, IAA,
ZnT8),
-
An oral glucose tolerance test, and
-
Determination of HbA1c [Ehehalt et al. 2010; Mayer-Davis et al.,
(2018)].
10–15% of all children and adolescents under the age of 15 with
type 1 diabetes have first-degree relatives with diabetes and thus a positive
family history [Rosenbauer et al. 2003; Scottish Study Group for the Care of the
Young Diabetic (2001)]. The risk of developing diabetes is 3 times higher for
children with a father suffering from diabetes than for children with a mother
suffering from diabetes [Gale et al. 2001]. While antibodies and other markers
might provide a prediction and risk calculation regarding the occurrence of
diabetes, there are no effective prevention strategies that could prevent the
manifestation of diabetes [Rosenbloom et al. 2000; Australasian Paediatric
Endocrine Group et al. 2005].
A general screening for type 1 diabetes should therefore not be performed in the
general population or in high-risk groups among children and adolescents
[Australasian Paediatric Endocrine Group et al. 2005]. According to the latest
recommendations gleaned from scientific studies, screening and intervention in
the absence of symptoms of type 1 diabetes remain reserved [Couper 2018].
Type 2 diabetes
An oral glucose tolerance test for the early detection of type 2 diabetes should
be performed as of age 10 in cases of excess weight (BMI>90th
percentile) and the presence of at least 2 of the following risk factors:
-
Type 2 diabetes in 1st or 2nd degree relatives,
-
Belonging to a group with increased risk (e. g. East Asians,
African Americans, Hispanics),
-
Extreme obesity (BMI>99.5th percentile) or
-
Signs of insulin resistance or changes associated with it (arterial
hypertension, dyslipidaemia, elevated transaminases, polycystic ovarian
syndrome, acanthosis nigricans)
[Working Group for Obesity in Childhood and Adolescence (AGA)
2008/Arbeitsgemeinschaft Adipositas im Kindes- und Jugendalter AGA
(2008)].
Therapy for type 1 diabetes
Therapy for type 1 diabetes
Start of therapy
Insulin therapy should be initiated immediately after the diagnosis of type 1
diabetes, as the child’s metabolism can deteriorate rapidly. A diabetes
team experienced with children should be called in as soon as possible [Bangstad
et al. 2007].
Therapy goals
Initial treatment and long-term care should be carried out by a team experienced
in paediatric diabetology continuously from ages 1–18, and, in certain
cases, also up to the age of 21. Specialised care has been shown to contribute
to a reduction in days spent in hospital and readmissions, to a lower HbA1c
value, better disease management and fewer complications [Cadario et al. 2009;
Pihoker et al. 2014; Australasian Paediatric Endocrine Group et al. 2005].
The treatment of type 1 diabetes by the treatment team should include:
-
Insulin therapy,
-
Individual metabolic self-monitoring,
-
Age-adapted structured training as well as
-
Psychosocial care for the affected families.
The following medical goals are in the foreground when caring for paediatric
patients with diabetes mellitus [Danne et al. 2014; Ziegler 2018]: avoidance of
acute metabolic lapses, prevention of diabetes-related microvascular and
macrovascular secondary diseases and normal physical development (growth in
height, weight gain, onset of puberty). The patient’s psychosocial
development should be affected as little as possible by diabetes and its
therapy, and integration and inclusion in day care, school and vocational
training should be ensured.
Individual therapy goals should be formulated together with the child or
adolescent and his or her family (HbA1c value, blood glucose target ranges,
behavioural changes that come with risk-taking lifestyles, integration efforts,
etc.).
The HbA1c target value of<7.5% was modified in 2018 by the ISPAD
to a new target value of<7.0%, the ADA recommendations still lie
at<7.5%, whereas the English NICE recommendations assume a
target value of<6.5% [DiMeglio et al., (2018)].
An additional parameter for evaluating the metabolic state is the time spent in
the target range (TIR=time in range). As a rule, the target range is
defined as 70–180 mg/dl. An individual goal for the
duration of the TIR is recommended [Danne 2017; Battelino T. 2019].
Preprandial glucose values should be between 70 and 130 mg/dl
(4.0–7.0 mmol/l) and postprandial values between 90 and
180 mg/dl (5.0–10.0 mmol/l). Values of
80–140 mg/dl (4.4–7.8 mmol/l)
are recommended at bedtime [DiMeglio 2018].
The average frequency of glucose control should be between 5 and 6 times a day
but can be significantly higher in individual cases [Ziegler et al. 2011].
Continuous treatment of type 1 diabetes
The continuity of the treatment of diabetes mellitus of a child or adolescent
with diabetes, both over time and during different phases of life and
development, is decisive for ensuring a metabolic situation as close as possible
to normoglycaemia and an unencumbered psychosocial development.
Care of children in day cares and schools
Children with diabetes should be cared for in day cares, regular schools and
after-school centres [Hellems and Clarke 2007]. The right to inclusion is laid
down in § 53 and § 54 of the German Social Code Book
XII/Sozialgesetzbuch XII. This provides the basis for the assumption of
costs for age-appropriate care.
An individual plan should be created for each institution which includes the
frequency and intervention limits of blood glucose measurements, the delivery of
insulin (mode, time, dose calculation), defining of mealtimes, symptoms and
management of hypoglycaemias and hyperglycaemias [American Diabetes Association
(ADA) 2015]. In addition to children, adolescents and their parents, all
caregivers in the social environment must also be trained to enable inclusion
[Ziegler 2018].
Support during the transition to young adulthood
The transition from paediatric to adult care affects young people with diabetes
aged 16–21 years in a life phase of general upheaval and should
therefore be accompanied. Various models (transitional consultations, structured
paediatric/internal medicine transition, etc.) are practised [Nakhla et
al. 2008; Australian Paediatric Endocrine Group et al. 2005; Court JM et al.,
2008].
Care in case of illness and preventing illness risks
In the case of serious illnesses or in perioperative cases, children with
diabetes should be referred to an experienced centre with well-trained staff and
the paediatric diabetologist should also be consulted [Brink et al. 2007].
Under no circumstances should insulin be completely omitted in the case of low
glucose levels or refusal to eat. The administration of carbohydrates is
necessary in order to avoid substrate deficiency and ketone body formation. The
possibility of measuring β-hydroxybutyrate should be provided [Laffel
2018].
Children with diabetes mellitus should be vaccinated according to STIKO
(Ständige Impfkommission/Standing Committee on Vaccination)
recommendations.
Diabetes treatment during physical activity/sports
Regular exercise improves metabolic control and should be a matter of course for
children and adolescents with diabetes. Regular swimming has been shown to
significantly reduce HbA1c [Sideravicite et al. 2006].
Since blood glucose is lowered by energy consumption during physical activity,
the risk of hypoglycaemia is increased. The strongest predictor for
hypoglycaemia is the initial glucose value, which should be at least
120 mg/dl (6.6 mmol/l); otherwise additional
carbohydrates may be required [Tansey et al. 2006]. Individual therapy plans
with insulin dose adjustment and corresponding behavioural rules should be put
together for each patient [Adolfsson 2018].
Insulin treatment
The standard treatment for paediatric patients with type 1 diabetes is
intensified insulin therapy [Danne 2018].
All insulin therapy should be carried out as part of comprehensive diabetic care
and with the support of the family.
Insulin therapy should be individually tailored to each child [Diabetes Control
and Complications Trial Research Group 1995; White et al. 2008; Nathan et al.
2005; Musen et al. 2008].
Human insulin or insulin analogues should be used for paediatric patients
[Bangstad et al. 2007; Danne et al. 2005; Mortensen et al. 2000; Deeb et al.
2001; Plank et al. 2005; Simpson et al. 2007].
Normal insulin should be used for intravenous insulin treatment.
Rapid-acting insulin and insulin analogues (prandial substitution)
There are differences between rapid-acting human insulin and fast-acting insulin
analogues in the onset and duration of action in children and can be used
flexibly for prandial substitution in children depending on the situation [Danne
et al. 2005; Mortensen et al. 2000].
Rapid-acting insulin analogues should be used for insulin pump therapy.
Long-acting insulin and insulin analogues (basal substitution)
Both NPH insulin and long-acting insulin analogues can be used individually for
basal insulin substitution in children [Danne et al. 2003; Danne et al. 2008;
Thisted et al. 2006; Robertson et al. 2007; Danne et al. 2013; Thalange et al.
2015].
Insulin pump therapy
Insulin pump therapy for children and adolescents is both safe and effective. It
has a positive effect on the frequency of hypoglycaemia, ketoacidosis and the
metabolism [Karges et al., (2017)]. Particularly in young children, pump therapy
enables better adjustment of the insulin dose, especially at night, thus helping
to prevent hypoglycaemias. Insulin pump therapy is recommended for the following
indications:
-
Small children, especially newborns, infants and preschoolers,
-
Children and adolescents with a marked increase in blood glucose in the
early morning hours (Dawn phenomenon),
-
Severe hypoglycaemias, recurrent and nocturnal hypoglycaemias (despite
intensified conventional therapy=ICT),
-
HbA1c value outside target range (despite ICT),
-
Severe blood glucose fluctuations, despite ICT, independent of the HbA1c
value,
-
Incipient microvascular or macrovascular secondary diseases,
-
Limitation of the quality of life through previous insulin therapy
-
Children with a great fear of needles,
-
Pregnant adolescents (ideally before conception in the case of a planned
pregnancy) as well as
-
Competitive athletes [Phillip et al. 2007].
Continuous glucose monitoring (CGM), sensoraugmented insulin therapy (SaT)
and sensoraugmented pump therapy (SaP)
CGM systems have been approved and can be prescribed for children and
adolescents. They are available in the form of rt (real-time) CGM systems and in
the form of isc (intermittent scanning) CGM systems. They can be used in
combination with ICT (sensor-augmented insulin therapy=SaT). Some CGM
systems can be used together with an insulin pump, or the insulin pump can serve
as a monitor for CGM data. This combination (CSII+CGM) is now called
sensor-augmented pump therapy (SaP). In addition, there is the possibility of
switching off the basal rate when the tissue glucose reaches a critical limit
(SaP+LGS=low-glucose suspend). A further development of the LGS
already interrupts the supply of insulin if it predicts that hypoglycaemia will
occur in the foreseeable future (predictive insulin switch-off, predictive
low-glucose suspend=PLGS). The combination of both systems is called
sensor-integrated pump therapy (SiP). Recently, CGM and insulin pumps have been
combined to form an “AID system” (automated insulin delivery).
An algorithm continuously calculates the respective insulin dose from the
measured tissue glucose values, taking into account individual user data.
Currently, “hybrid AIDs” are available for children and
adolescents with type 1 diabetes. Here, the term “hybrid” means
that the supply of the food-independent, basal insulin component takes place
automatically according to the current insulin requirement and the insulin
continues to be delivered manually by the user at mealtimes. All studies have
shown that such hybrid AID systems can improve metabolic control in children,
adolescents and adults with type 1 diabetes at night, but also during the
day.
Soon, so-called “Advanced AID Systems” will be available, which,
in addition to adjusting the basal rate at higher glucose values, will
automatically deliver small insulin microboli as an additional correction.
CGM should be used for children and adolescents with type 1 diabetes and insulin
pump therapy
-
To reduce the hypoglycaemia rate (frequency, duration, depth) or
-
In cases of recurrent nocturnal hypoglycaemia or
-
In cases of a lack of hypoglycaemia perception or
-
In cases of severe hypoglycaemia or
-
For improvement of metabolic control without a simultaneous increase in
hypoglycaemias or
-
To reduce pronounced glucose variability
[Bergenstal et al. 2013; Ly et al. 2013; Maahs et al. 2014].
CGM should be used in paediatric patients with type 1 diabetes who have not
achieved their HbA1c targets after having considered and used other measures and
training courses for optimizing metabolic control [Battelino et al. 2012;
Bergenstal et al. 2010; Danne 2017; Sherr 2018].
Nutritional recommendations
Nutritional counselling for children and adolescents with diabetes is an
important part of a comprehensive therapy training plan and should include the
following components:
-
Information on the blood glucose efficacy of carbohydrates, fats and
proteins,
-
Strengthening healthy diets as part of family meals and in public
institutions: regular, balanced meals and snacks (fruit, vegetables, raw
vegetables), prevention of eating disorders (especially uncontrolled,
binge eating) and the prevention of excess weight,
-
Consideration of cultural eating habits,
-
Enough energy for age-appropriate growth and development,
-
Working toward a normal BMI, which includes regular physical
activity,
-
A good balance between energy intake and consumption in accordance with
the insulin profiles,
-
Nutrition during illness and sport and
-
Reducing the risk of cardiovascular disease.
Nutrition specialists (dieticians/ecotrophologists) with an in-depth
knowledge of paediatric and adolescent nutrition and insulin therapy should
provide this counselling [Smart et al. 2014; Craig et al. 2011].
Nutritional recommendations should include all dietary components and their share
in daily energy intake [German Nutrition Society/Deutsche Gesellschaft
für Ernährung (DGE) 2015].
Diabetes training
Patient training is an essential part of diabetes therapy. It cannot be
successful without proper, individualised medical treatment [Bloomgarden et al.
1987; de Weerdt et al. 1991].
Children, adolescents and their parents or other primary caregivers should have
continuous access to qualified training starting from the time of diagnosis
onwards [Craig et al. 2011; Bundesärztekammer (BÄK) et al.;
Canadian Diabetes Association Clinical Practice Guidelines Expert Committee
2013; Kulzer et al., 2013; Martin et al. 2012; Lange et al. 2014; Haas et al.
2014].
Training should be offered to caregivers in institutions (e. g. teachers
in schools, educators in day cares, nurseries, after-school centres or group
homes) [Hellems et al. 2007; Lange et al. 2012; Clarke et al. 2013].
The training should be conducted by a multi-professional diabetes team with
proper knowledge of age-specific needs, possibilities and requirements that
current diabetes therapies place on patients and their families.
All team members should participate in the training and work toward formulating
and achieving uniform therapy concepts and goals [Swift et al. 2010; Lange et
al. 2014; Cameron et al. 2013].
The learning process should be accompanied by evaluated training materials that
are oriented towards the cognitive development and needs of children and
adolescents. The same applies to training materials for parents which should
include parenting tasks and age-specific diabetes therapy of their children
[Martin et al. 2012; Lange et al. 2012; Lange et al. 2014].
Diabetic training is a continuous process and can only be successful through
repeated needs-based offers (at least every 2 years) during long-term care. New
therapy concepts, e. g. the start of insulin pump therapy or continuous
glucose monitoring (CGM) and new life stages (e. g. starting school)
should be accompanied by additional training. Other diseases (e. g.
celiac disease or ADHD) or acute complications (e. g. DKA, severe
hypoglycaemias) or psychological problems require personalised treatment
[Jacobson et al. 1997; Haas et al. 2014; Lange et al. 2014; Delamater et al.
2014].
Rehabilitation
In-patient rehabilitation can be carried out:
-
In the case of persistently poor skills in dealing with diabetes,
-
If there are diabetic secondary complications which are either already
present or imminent in the short-term,
-
After the in-patient primary therapy of the newly diagnosed diabetes
mellitus if initial training cannot be provided near the
patient’s home (in the form of follow-up treatment),
-
In the case of long-term inadequate metabolic control under out-patient
care conditions, e. g. recurrent hypoglycaemia or ketoacidosis,
and
-
In the event of serious disruptions to activities and/or to the
child or adolescent being able to participate in age-appropriate
activities or in everyday life, e. g. frequent sick days
(§ 4 SGB 9; Federal Working Group for
Rehabilitation/Bundesarbeitsgemeinschaft Rehabilitation)
[Federal Working Group for Rehabilitation/Bundesarbeitsgemeinschaft
für Rehabilitation (BAR) 2008; Fröhlich et al. 2008; German
Pension Insurance Association/Deutsche Rentenversicherung Bund 2009;
German Society for Paediatric Rehabilitation and Prevention/Deutsche
Gesellschaft für pädiatrische Rehabilitation und
Prävention 2007; Stachow et al. 2001].
Psychological and social risks, comorbidities and interventions
Psychological and social risks, comorbidities and interventions
In the case of a diabetes diagnosis, a history of the psychosocial family situation
should be recorded. The families should also receive psychosocial counselling and
the interdisciplinary team should provide them with therapeutic aids for diabetes
management. The psychological situation of the parents and other primary caregivers
also needs be taken into account [Hürter et al. 1991; Sundelin et al. 1996;
Delamater et al. 1990; Craig et al. 2011; Delamater et al. 2014; Forsander et al.
1998; Sullivan-Bolyai et al. 2011; Forsander et al. 2000; Zenlea et al. 2014].
The current psychosocial situation and possibly stressful life events should be
continuously recorded within the framework of long-term care (intellectual,
academic, emotional and social development) and taken into account in therapy
planning.
For this reason, it is important for social workers and psychologists with
diabetes-specific expertise to be an integral part of the interdisciplinary diabetes
team [Silverstein et al. 2005; Craig et al. 2011; de Wit et al. 2008; Delamater et
al. 2014; Kulzer et al. 2013; Hilliard et al. 2011; Haas et al. 2014; de Wit et al.,
2012].
Particularly in adolescents, signs of eating disorders and mood affective disorders
(e. g. anxiety, depression, adjustment disorders) should be monitored and
professional help sought and carried out in a timely manner.
If a psychiatrically-relevant disorder is present, paediatric and adolescent
psychiatrists or psychological psychotherapists should be consulted in order to
initiate co-treatment if necessary. A coordinated treatment between psychiatrist and
diabetes team should be strived for [Northam et al. 2005; Lawrence et al. 2006;
Delamater et al. 2014; Kulzer et al. 2013; Young et al. 2013].
Children and adolescents with diabetes have an increased risk of impaired information
processing and learning. Children with early onset diabetes, severe hypoglycaemias
and chronic hyperglycaemias in early life are particularly affected.
Therefore, the school performance of children with increased risk (diabetes diagnosis
under 5 years, severe/chronic hyperglycaemias) should be recorded. In case
of learning difficulties, they, just as all children, should be assessed
neuro-physiologically and psychologically and, if necessary, receive educational
support [Delamater et al. 2014].
Acute complications
Diabetic ketoacidosis
Diabetic ketoacidosis is a potentially life-threatening disease. It should be
treated immediately in a specialized facility by a diabetes team experienced
with children. There should be a written treatment plan for treating diabetic
ketoacidosis in children and adolescents [Australasian Paediatric Endocrine
Group et al.; Glaser et al. 2006; Fiordalisi et al. 2007].
The biochemical criteria for ketoacidosis include:
Ketoacidosis is categorised into 3 stages of severity:
-
Mild (pH<7.3; bicarbonate<15 mmol/l),
-
Moderate (pH<7.2; bicarbonate<10 mmol/l)
and
-
Severe (pH<7.1; bicarbonate 5 mmol/l)
[Wolfsdorf et al. 2007].
The following therapy goals are to be pursued in ketoacidosis:
-
Stabilisation of cardiovascular system with initial volume bolus using
isotonic solution,
-
Subsequent slow, balanced fluid resuscitation and electrolyte
replacement,
-
Slow normalization of blood glucose,
-
Balancing out of acidosis and ketosis,
-
Avoidance of therapy complications (cerebral oedema, hypokalaemia)
and
-
Diagnosis and therapy of triggering factors
[Australasian Paediatric Endocrine Group et al. 2005b; Wolfsdorf et al. 2018]
([Tab. 1]).
Tab. 1 Medicinal treatment of ketoacidosis (taking the
control of electrolytes, pH, blood glucose, ketone bodies into
consideration).
Treatment goal/indication
|
Medicine
|
Dose
|
Chronological sequence
|
Initial stabilisation of cardiovascular system, if
necessary
|
NaCl 0.9%
|
10–20 ml/kg IV
|
Immediately over 1–2 h
|
Fluid resuscitation after initial cardiovascular
stabilisation
|
NaCl 0.9% or Ringer’s solution, after
4–6 h NaCl 0.45% also possible
|
Maximum daily IV dose<1.5 to 2 times the maintenance
requirement in relation to
age/weight/body
|
At least over 36–48 h
|
Lowering of blood glucose
|
Normal insulin
|
0.1 U/kg/h IV, for younger children
0.05 U/kg/h
|
Begin insulin administration 1–2 h after
start of volume administration; no interruption of insulin
delivery up to pH>7.3; lowering of blood glucose by
2–5 mmol/l/h
(36–90 mg/dl/h)
|
Avoidance of hypoglycaemia
|
Glucose
|
Final concentration: 5% glucose/0.45%
NaCl solution
|
Start from BG as of 15 mmol/l
(270 mg/dl) or at lowering of
BG>5 mmol/l/h
(90 mg/dl/h)
|
Balance of potassium
|
KCl
|
40 mmol/l volume;
5 mmol/kg/day IV;
not>0,5 mmol/kg/h
|
For hypokalaemia immediately, for normokalaemia together with
the start of insulin administration, in the case of
hyperkalaemia only after resumption of urine production;
continuous administration until volume compensation has been
fully compensated
|
Balance of phosphates
|
Potassium phosphate
|
At pH<7.1 half the potassium substitution
|
Until phosphate is in the normal range again
|
During the treatment of severe diabetic ketoazidoses, clinical observation and
monitoring should take place at least every hour [Australasian Paediatric
Endocrine Group 2005; Edge et al. 2006; Wolfsdorf et al. 2018].
Patients with severe ketoacidosis and an increased risk of cerebral oedema should
be treated immediately in an intensive care unit or a specialized diabetes unit
with comparable equipment by a diabetes team experienced with children.
Patients with suspected cerebral oedema should be treated in an intensive care
unit in cooperation with an experienced diabetes team [Australasian Paediatric
Endocrine Group et al. 2005; Wolfsdorf et al. 2018].
Patients with clear signs of cerebral oedema should be treated with mannitol or
hypertonic saline solution before further diagnostic measures (MRT) are
initiated [Australasian Paediatric Endocrine Group et al. 2005; Fiordalisi et
al. 2007; Hanas et al. 2007; Roberts et al. 2001; Franklin et al. 1982; Banks
and Furyk (2008); Wolfsdorf et al. 2018].
Case reports or case series are available on the therapeutic efficacy in
symptomatic cerebral oedema of an early intravenous mannitol administration
(0.5–1 g/kg) over 10–15 min and repeated
if necessary (after 30 min.) [Fiordalisi et al. 2007; Hanas et al. 2007;
Roberts et al. 2001; Franklin et al. 1982].
Hypoglycaemia
Hypoglycaemia is the most common acute complication in diabetes [Diabetes Control
and Complications Trial Research Group 1994].
According to the latest recommendation by the Hypoglycemia Study Group
[International Hypoglycaemia Study Group (2017)], a distinction is made between
blood glucose values in the following groups:
Stage 1:<70 mg/dl (3.9 mmol/l), requires
attention and treatment, if necessary
Stage 2:<54 mg/dl (3 mmol/l), always
requires immediate treatment and
Stage 3: with impaired consciousness, always requires immediate treatment.
Slight hypoglycaemia can be corrected by the patient through the intake of
fast-acting carbohydrates.
Severe hypoglycaemia can only be remedied with external help due to the
accompanying limitation or loss of consciousness. In addition to a loss of
consciousness, a severe hypoglycaemia can also be accompanied by a cerebral
seizure.
Children and adolescents with type 1 diabetes should always carry fast-acting
carbohydrates in the form of dextrose or the like, in order to be able to act
immediately in the event of mild hypoglycaemia and thus prevent severe
hypoglycaemia. Parents or other primary caregivers should be instructed in the
use of glucagon injections or other immediate measures.
Caregivers in e. g. day cares and day care centres, and teachers in
schools should also receive instruction on the risks and treatment options for
hypoglycaemia.
In the case of hypoglycaemia perception disorder, a higher blood glucose level
should be temporarily set [Australasian Paediatric Endocrine Group et al. 2005;
Clarke et al. 2008]. The use of a CGM system with hypoglycaemia suspend should
also be considered.
Long-term complications and preventive examinations (screening)
Long-term complications and preventive examinations (screening)
The HbA1c value should be determined at least every 3 months to check metabolic
control [Diabetes Control and Complications Trial Research Group 1994; Nathan et al.
2005; White et al. 2008]. All other long-term controls are listed in [Tab. 2].
Tab. 2 Long-term complications: screening examinations and
interventions.
Screening examination and intervals
|
Recommended screening method(s)
|
Interventions
|
1. Retinopathy:
|
|
|
2. Nephropathy
|
Detection of microalbuminuria:
-
Concentration measurement:
20–200 mg/l
-
Albumin excretion rate>20
to<200 μg/min
-
Albumin-creatinine ratio
-
24-hour urine collection, if necessary
|
-
Improvement of glycaemic control
-
For hypertension+microalbuminuria:
-
ACE inhibitors
-
Angiotensin II receptor blockers
-
Persistent microalbuminuria without hypertension:
consider ACE inhibitors
-
Nicotine abstinence
|
3. Nephropathy
|
|
|
4. Hypertension
|
|
-
Lifestyle intervention (exercise, salt reduction, weight
reduction, reduction of alcohol and/or
nicotine)
-
If not successful: ACE inhibitors; for contraindications
or side effects: angiotensin II receptor blockers;
combination with other drugs if required
|
5. Hyperlipidaemia:
|
Detection of
-
Total cholesterol
-
HDL cholesterol
-
LDL cholesterol
-
Triglycerides
|
|
Associated autoimmune diseases
Associated autoimmune diseases
Diagnostics and therapy of thyroid diseases
In children and adolescents with diabetes, TSH determination and determination of
thyroid autoantibodies (anti-TPO, TgAb) should be performed upon diabetes
manifestation and at regular intervals of 1–2 years or with associated
symptoms [Australasian Paediatric Endocrine Group et al. 2005; Bangstad et al.
2007; Silverstein et al. 2005; Kordonouri et al. 2011].
If TPO autoantibodies and/or a TSH increase are present, a sonography of
the thyroid should be performed.
For the therapy of autoimmune hypothyroidism or struma, L-thyroxine should be
used according to the therapy plan ([Abb.
1]).
Abb. 1 Diagram for treating Hashimoto’s thyroiditis.
Source: Diagnosis, Therapy and Follow-Up of Diabetes Mellitus in
Children and Adolescents. S3-Guideline of the DDG and AGPD 2015. German
Association of the Scientific Medical Professional Societies/AWMF
registration number 057–016 [rerif].
Diagnostics and therapy of celiac disease
Children and adolescents with diabetes are to be examined for celiac disease in
the event of diabetes manifestation and at intervals of 1–2 years and in
the case of associated symptoms [Australasian Paediatric Endocrine Group et al.
2005; Hill et al. 2005; Silverstein et al. 2005; Kordonouri et al. 2007;
Kordonouri et al. 2014; Kordonouri et al. 2011].
In cases of confirmed celiac disease (serologic and bioptic) with symptoms or
extraintestinal manifestation, a gluten-free diet should be followed [Hansen et
al. 2006; Amin et al. 2002; Hill et al. 2005; Lewis et al. 1996; Kordonouri et
al. 2011].
According to the latest recommendations, a biopsy can be dispensed with in the
case of clear clinical symptoms, high tTG-A antibodies (>10 times above
norm) and endomysium antibodies as well as a positive HLA-DQ2 or DQ8 haplotype
[Mahmud 2018]. However, this recommendation is inconsistent with other
guidelines. As most children with type 1 diabetes and positive tTG-A are
asymptomatic, a biopsy is still frequently required to confirm the
diagnosis.
In asymptomatic patients, the indication for a gluten-free diet or further
follow-up should be carried out in cooperation with the paediatric
gastroenterologist.
Other forms of diabetes in childhood and adolescence
Other forms of diabetes in childhood and adolescence
Type 2 diabetes
Type 2 diabetes in adolescents should be diagnosed according to the limits for
fasting glucose and oral glucose tolerance test (OGTT) using the standard or
reference method.
If the following limit values are exceeded, the result in asymptomatic patients
must be confirmed by a second test on a different day:
Additional laboratory tests can provide information on the differentiation
between type 2 diabetes and type 1 diabetes:
-
C-peptide and
-
Diabetes-specific autoantibodies (GAD, IA-2, ICA, IAA, ZnT8) [Alberti et
al. 2004; Genuth et al. 2003].
In the treatment of type 2 diabetes in adolescents ([Abb. 2]) [Alberti et al. 2004]), the target fasting glucose should
be<126 mg/dl and the target HbA1c value should
be<7% [Zeitler et al. 2014; UK Prospective Diabetes Study
(UKPDS) Group 1998; Holman et al. 2008].
Abb. 2 Diagram for treating type 2 diabetes in children and
adolescents. Source: Diagnosis, Therapy and Follow-Up of Diabetes
Mellitus in Children and Adolescents. S3-Guideline of the DDG and AGPD
2015. German Association of the Scientific Medical Professional
Societies/AWMF registration number 057–016 [rerif].
Training for adolescents with type 2 diabetes should include nutritional
counselling and guidance on physical activity as part of a structured obesity
programme [Reinehr et al. 2007; Working Group for Obesity in Childhood and
Adolescence/Arbeitsgemeinschaft Adipositas im Kindes- und Jugendalter (AGA)
2008].
In addition, individually tailored modular training for type 2 diabetes should
take place using the relevant contents from the type 1 diabetes training.
At a starting HbA1c value of≥9% or spontaneous
hyperglycaemia≥250 mg/dl and with signs of absolute insulin
deficiency (ketonuria, ketoacidosis), an initial insulin therapy should be
started. In all other cases, metformin is the first drug of choice for drug
therapy in children and adolescents [Shimazaki et al. 2007; UK Prospective
Diabetes Study (UKPDS) Group 1998; Jones et al. 2002; Gottschalk et al. 2007;
Zeitler et al. 2014]. In addition to insulin, metformin is currently the only
approved drug for this age group.
Monogenetic diabetes
A molecular genetic diagnosis of the most common MODY forms can be recommended in
cases of justified assumptions because of its importance for therapy, long-term
prognosis and genetic counselling of families [Hattersley et al. 2006; Ellard et
al. 2008] ([Tab. 3]).
Tab. 3 The most common MODY forms and their clinical
characteristics.
MODY type (international share in percent); heredity
|
Age (Y) at manifestation
|
Severity of hyperglycaemia
|
Clinical picture
|
HNF1A-MODY (MODY3) HNF-1α-(20–50%)
autosomal dominant
|
14 (4–18)
|
Severe hyperglycaemia
|
-
Strong increase of BG in OGTT
(>90 mg/dl), low renal
threshold (frequent glucosuria in BG
values)<180 mg/dl
(<10 mmol/l))
-
Increasing hyperglycaemia with age
-
Response to sulfonylureas/glinides
|
GCK-MODY (MODY2) Glucokinase (20–50%)
autosomal dominant
|
10 (0–18)
|
Mild hyperglycaemia
|
-
Often by chance
-
Fasting BG slightly increased between 99 and
144 mg/dl
(5.5–8 mmol/l)
-
BG increase in the OGTT low
(by<63 mg/dl
or<3.5 mmol/l)
-
No BG deterioration in old age
-
Rarely microvascular or macrovascular complications,
even without drug therapy
|
HNF4A-MODY (MODY1) HNF-4α-(1–5%)
autosomal dominant
|
17 (5–18)
|
Significantly hyperglycaemic
|
|
Before the affected genes are sequenced, counselling and information must be
provided in accordance with the Gene Diagnostics Act, especially on the right to
knowledge and ignorance of genetic information [Murphy et al. 2008; McDonald and
Ellard (2013); Ellard et al. 2008; Badenhoop et al. 2008; Deutsche Gesellschaft
für Psychiatrie, Psychotherapie und Nervenheilkunde DGPPN (2009)].
Neonatal diabetes mellitus (NDM)
A special form of genetic diabetes is neo-natal diabetes mellitus (NDM) and
diabetes that manifests within the first 6 months of life. Clinically, they are
classified into 2 subgroups: transient (TNDM) and permanent (PNDM) neonatal
diabetes mellitus. For diagnosis of neonatal diabetes or diabetes manifestation
up to and including the sixth month of life, see the box “Neonatal
diabetes – diagnostic procedure”.
In the case of etiologically unexplained neonatal diabetes mellitus and diabetes
mellitus, which manifests itself up to the 6th month of life, a molecular
genetic analysis should be performed as early as possible in order to start
appropriate therapy for sulfonylurea-sensitive mutations as early as possible
[Flanagan et al. 2006; Babenko et al. 2006; Klupa et al. 2008; Battaglia et al.
2012; Shah et al. 2012].
In most cases, insulin therapy is administered first if neonatal diabetes is
present. Under in-patient conditions and tight controls, an initial therapy
attempt with sulfonylureas may be useful if the result of the molecular genetic
examination is expected shortly. In the presence of a mutation of the KCNJ11 or
the ABCC8 gene, therapy with sulfonylureas should be attempted as early as
possible [Hattersley et al. 2006; Pearson et al. 2006; Mlynarski et al. 2007;
Koster et al. 2008; Slingerland et al. 2008; Thurber et al., (2015)].
NEONATAL DIABETES – DIAGNOSTIC PROCEDURE
Diagnostic procedure for diabetes manifestation up to the 6th month of life, if necessary
up to the 1st year of life
-
Exclusion of pancreatic insufficiency
-
If sonography is unremarkable or not assessable:
-
Determination of diabetic autoantibodies (GAD, IA-2, ICA, IAA, ZnT8)
-
If sonography is unremarkable or not assessable, autoantibodies negative and
elastase in stool without findings, a molecular genetic analysis should be
carried out promptly because of the high therapeutic relevance for the
differential diagnosis of:
-
Anomalies of chromosome 6q24 (TNDM)
-
Mutations of the KCNJ11 gene (PNDM, TNDM)
-
Mutations of the ABCC8 gene (PNDM, TNDM)
-
Mutations of insulin gene (PNDM)
-
For reduced elastase in stool and negative molecular genetic analysis for
chromosome 6q24, KCNJ11, ABCC8 and insulin gene as well as negative or positive
autoantibodies:
Diabetes in cystic fibrosis
Since diabetes in cystic fibrosis is often clinically difficult to detect,
children with cystic fibrosis as of age 10 should receive an oral glucose
tolerance test annually [Lanng et al. 1994]. New studies show better results
using CGM to detect glucose variability [Chan 2018].
With a confirmed diagnosis of diabetes, early treatment of cystic
fibrosis-related diabetes (CFRD) should be initiated [Nousia-Arvanitakis et al.
2001; Rolon et al. 2001; Lanng et al. 1994; Dobson et al. 2002; Frost et al.,
2018].
Insulin is to be used for long-term therapy of CF-related diabetes. In the first
12 months after diagnosis, however, a therapy attempt with glinides or
sulphonylureas may be undertaken [Ballmann et al. 2014; O’Riordan et al.
2008].
If cystic fibrosis is present, a high-calorie, high-fat diet should also be
followed after the diagnosis of diabetes. Calorie reduction is contraindicated
[O’Riordan et al. 2008].
Imprint (German)
The evidence-based guideline was prepared on behalf of the German Diabetes
Society (Deutsche Diabetes Gesellschaft - DDG). The German Diabetes Society is
represented by its president (2019–2021. Dr. Monika Kellerer) and the
DDG guideline officer (Prof. Dr. Andreas Neu).
The Guidelines Group is composed of members of the Association for Paediatric
Diabetology (AGPD), members of the 2009 Guidelines Group and a patient
representative.
Expert group responsible for the 2015 version of the guidelines:
Prof. Dr. A. Neu, Tübingen (Coordinator)
J. Bürger-Büsing, Kaiserslautern (patient representative)
Prof. Dr. T. Danne, Hannover
Dr. A. Dost, Jena
Dr. M. Holder, Stuttgart
Prof. Dr. R. W. Holl, Ulm
Prof. Dr. P.-M. Holterhus, Kiel
PD Dr. T. Kapellen, Leipzig
Prof. Dr. B. Karges, Aachen
Prof. Dr. O. Kordonouri, Hanover
Prof. Dr. K. Lange, Hanover
S. Müller, Ennepetal
PD Dr. K. Raile, Berlin
Dr. R. Schweizer, Tübingen
Dr. S. von Sengbusch, Lübeck
Dr. R. Stachow, Westerland
Dr. V. Wagner, Rostock
PD Dr. S.Wiegand, Berlin
Dr. R. Ziegler, Münster
Literature research:
Dr. Barbara Buchberger (MPH), Hendrick Huppertz, Beate Kossmann, Laura Krabbe,
Dr. Jessica Tajana Mattivi at the Endowed Chair of Medical
Management/Stiftungslehrstuhl für Medizinmanagement at the
University of Duisburg-Essen (Head Prof. Dr. Jürgen Wasem)
Methodical support:
Dr. Monika Nothacker, Berlin, German Association of the Scientific Medical
Professional Societies/Arbeitsgemeinschaft der wissenschaftlichen
medizinischen Fachgesellschaften (AWMF)
Editorial work:
Andrea Haring, Berlin
Cornelia Berg, Tübingen
External reviewer:
Prof. Dr. H. Krude
Specialist in paediatrics, additional training in paediatric endocrinology and
diabetology, for the Paediatric Endocrinology Working Group (APE), Berlin
(Diabetes and Thyroid Diseases)
Prof. Dr. K. P. Zimmer
Specialist in paediatrics and adolescent medicine, additional training in
paediatric gastroenterology, Giessen (Diabetes and Celiac Disease)
Prof. Dr. M. Ballmann
Specialist in paediatrics and adolescent medicine, additional training in
paediatric pneumology, for the Paediatric Pneumology Working Group, Siegen
(Diabetes in Cystic Fibrosis)
Prof. Dr. A. Fritsche
Specialist in internal medicine, diabetologist, Tübingen
Coordination of the review 2013–2015:
Prof. Dr. A. Neu, Tübingen