1. Olgahospital, Pediatrics 5 (Pediatric Oncology, Hematology, Immunology); Zentrum für Kinder-, Jugend- und Frauenmedizin; Klinikum Stuttgart; Stuttgart Germany
2. Olgahospital; Institute of Radiology, Zentrum für Kinder-, Jugend- und Frauenmedizin; Klinikum Stuttgart; Stuttgart Germany
3. Department of Pediatric Surgery; University Children's Hospital; Marburg Germany
4. Department of Radiotherapy; Klinikum Stuttgart; Stuttgart Germany
5. Department of Pediatric Surgery and Urology; University Children's Hospital; Tuebingen Germany
6. Department of Pediatric Hematology and Oncology; St. Anna Kinderspital Wien; Wien Austria
7. Department of Pediatric Hematology and Oncology; University Children's Hospital Muenster; Muenster Germany
8. Hospital for Children and Adolescents; University of Frankfurt; Frankfurt/Main Germany
9. Department of Pediatric Oncology; University Children's Hospital; Tuebingen Germany