1. Klinikum der Landeshauptstadt Stuttgart gKAöR, Olgahospital, Stuttgart Cancer Center, Zentrum für Kinder‐, Jugend‐ und Frauenmedizin, Pädiatrie 5 (Pädiatrische Onkologie, Hämatologie, Immunologie) Stuttgart Germany
2. Medizinische Fakultät der Universität Tübingen Tübingen Germany
3. Pediatric Oncology Unit, Fondazione IRCCS Istituto Nazionale Tumori Milan Italy
4. Department of Pediatrics Stanford University School of Medicine Palo Alto California United States
5. Section of Pediatric Pathology, University of Bonn Bonn Germany
6. Department of Radiation Oncology University of North Carolina School of Medicine Chapel Hill North Carolina United States
7. Division of Pediatric Surgery, Department of Surgery Northwestern University Feinberg School of Medicine Chicago Illinois United States
8. Jimmy Everest Section of Pediatric Hematology Oncology, Department of Pediatrics University of Oklahoma Health Sciences Center Oklahoma City Oklahoma United States
9. Division of Pediatric Hematology/Oncology/Stem Cell Transplant, Department of Pediatrics Ann & Robert H. Lurie Children's Hospital of Chicago, Northwestern University Feinberg School of Medicine Chicago Illinois United States
10. Hopp‐Children's Cancer Center, NCT Heidelberg (KiTZ) Heidelberg Germany
11. Division of Pediatric Neurooncology German Cancer Research Center (DKFZ), German Cancer Consortium (DKTK) Heidelberg Germany
12. Department of Pediatric Hematology and Oncology Heidelberg University Hospital Heidelberg Germany
13. Pathology Unit, Department of Laboratories Bambino Gesù Children's Hospital, IRCCS Rome Italy
14. Department of Pediatric Surgery and Pediatric Urology University Children's Hospital, Eberhard Karls University Tuebingen Tuebingen Germany
15. Oncology Department and Danish Center for Particle Therapy Aarhus University Hospital Aarhus Denmark
16. Department of Particle Therapy University Hospital Essen, West German Proton Therapy Centre Essen (WPE), West German Cancer Center (WTZ), German Cancer Consortium (DKTK) Germany
17. Pediatric Surgery, Department of Emergencies and Organ Transplantation University of Bari Bari Italy
18. Department of Pathology and Laboratory Medicine Nationwide Children's Hospital Columbus Ohio United States
19. Department of Pediatrics Maine Medical Center Portland Maine United States
20. SIREDO Oncology Center (Care, Innovation and Research for Children, Adolescents and Young Adults with Cancer), PSL University, Institut Curie Paris France