1. Department Osnabrueck, Center for Radiotherapy Rheine-Osnabrueck, Osnabrueck, Germany
2. Pediatric Hematology and Oncology Muenster, University Children’s Hospital Muenster, Germany
3. Department of Pediatrics, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
4. Royal Victoria Infirmary, Newcastle, United Kingdom
5. Inserm U830, Laboratory of Genetics and Biology of Cancers, Institut Curie, Paris, France
6. Université Paris-Sud, Le Kremlin-Bicêtre, and Gustave Roussy Institute, Villejuif, France
7. Zentrum für Pathologie Kempten-Allgäu, Kempten, Germany
8. Department of Radiation Oncology, University of Luebeck and University Medical Center Schleswig-Holstein, Campus Luebeck, Germany
9. Institute of Biostatistics and Clinical Research, University of Muenster, Muenster, Germany
10. St. Anna Kinderkrebsforschung e.V., Children’s Cancer Research Institute, and Department of Pediatrics, Medical University Vienna
11. Clinic of Pediatric Oncology, Hematology and Clinical Immunology, Heinrich-Heine-University, Duesseldorf, Germany
12. Department of Orthopedic Surgery, University Hospital Muenster, Muenster, Germany
13. Seattle Children’s Hospital and Fred Hutchinson Cancer Research Center, University of Washington, Seattle, Washington, USA
14. Skåne University Hospital, Lund University, Lund, Sweden
15. Department of Paediatric Haematology and Oncology Charles University, 2nd School of Medicine, Prague, Czech Republic
16. Kiel Paediatric Tumor Registry, Department of Paediatric Pathology, Christian-Albrechts-University Kiel, Kiel, Germany
17. Alder Hey Children’s National Health Service Foundation Trust, Liverpool, UK
18. Gustave Roussy Institute, Villejuif, France
19. Vestische Kinder-und Jugendklinik Datteln, Witten/Herdecke University, Datteln, Germany
20. Department of Radiotherapy and Radiation Oncology, Saarland University Medical Center, Homburg, Germany
21. Department of Radiation Therapy, University of Erlangen, Erlangen, Germany
22. Department of Nuclear Medicine, University of Münster, Münster, Germany
23. Department of Radiotherapy, University Hospital Muenster, Muenster, Germany
24. Clinic for Particle Therapy, West German Proton Therapy Center Essen, West German Cancer Center, University Hospital Essen
25. Emma Children Hospital AMC, University of Amsterdam, Amsterdam, the Netherlands
26. Institute of Experimental Musculoskeletal Medicine, University Hospital Muenster, Muenster, Germany
27. Department of Clinical Radiology, University Hospital Muenster, Muenster, Germany
28. NIHR University College London Hospitals Biomedical Research Centre, London, UK
29. Department of Pediatrics, University of Pennsylvania Perelman School of Medicine and Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA