1. Pediatrics 5 (Oncology, Hematology, and Immunology); Stuttgart Cancer Center; Klinikum Stuttgart, Olgahospital; Stuttgart Germany
2. Kiel Pediatric Tumor Registry; Department of Pediatric Pathology; University of Kiel; Kiel Germany
3. Pediatrics 3 (Cardiology, Intensive Care Medicine, Pulmonology, and Allergology); Klinikum Stuttgart, Olgahospital; Stuttgart Germany
4. Clinic of Pediatric Hematology and Oncology; University Medical Center Hamburg-Eppendorf; Hamburg Germany
5. Department of Pediatric Oncology; University Children's Hospital; Zürich Switzerland
6. Department of Pediatric Hematology and Oncology; University Medical Center Göttingen; Göttingen Germany
7. Department of Pediatric Radiology; Klinikum Stuttgart, Olgahospital; Stuttgart Germany
8. Department of Pediatric Oncology; University of Frankfurt (Main); Frankfurt am Main Germany