Kinderchirurgische Klinik (weiland Direktor: Prof. Dr. W. Ch. Hecker) im Dr. von Haunerschen Kinderspital der Universität München, dem Pathologischen Institut (weiland Direktor: Prof. Dr. Max Eder) der Universität München
* Presented in part by Dr. Ring-Mrozik at the 39th Annual Meeting of the Northwest German Pediatric Society, Bremen, 26 May 1990.Dedicated to Prof. Dr. Fritz Rehbein on his birthday.