1
Department of Paediatric Surgery, Orthopaedics and Traumatology, University of Turku and Turku University Hospital, Turku, Finland
2
Department of Surgery, Kanta-Häme Central Hospital, Hämeenlinna, Finland
,
Ilkka Helenius
1
Department of Paediatric Surgery, Orthopaedics and Traumatology, University of Turku and Turku University Hospital, Turku, Finland
3
Department of Orthopaedics and Traumatology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
,
Susanna Heiskanen
1
Department of Paediatric Surgery, Orthopaedics and Traumatology, University of Turku and Turku University Hospital, Turku, Finland
,
Johanna Syvänen
1
Department of Paediatric Surgery, Orthopaedics and Traumatology, University of Turku and Turku University Hospital, Turku, Finland
,
Teemu Kemppainen
4
Department of Biostatistics, University of Turku and Turku University Hospital, Turku, Finland
,
Eliisa Löyttyniemi
4
Department of Biostatistics, University of Turku and Turku University Hospital, Turku, Finland
,
Mika Gissler
5
Knowledge Brokers, Finnish Institute of Health and Welfare, Helsinki, Finland
6
Department of Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden and Academic Primary Health Care Centre, Region Stockholm, Stockholm, Sweden