1. Department of Pediatric and Adolescent Oncology; Gustave Roussy; Villejuif France
2. Division of Hematology; Oncology, and Stem Cell Transplantation; Ann & Robert H. Lurie Children's Hospital of Chicago; Chicago Illinois
3. Pediatric Hematology and Oncology Division; Padova University; Padova Italy
4. Department of Pediatric Surgery; CHU Bicetre; Le Kremlin-Bicêtre France
5. Department of Oncology Clinical Research; Merck Research Laboratories; North Wales Pennsylvania
6. Department of Surgery; East Carolina University; Greenville North Carolina
7. Pediatric Oncology Unit; Fondazione IRCCS Istituto Nazionale Tumori; Milano Italy
8. Department of Pediatric Oncology; University of Wales; Cardiff United Kingdom
9. Department of Radiotherapy; Memorial Sloan Kettering Cancer Center; New York City New York
10. Clinical Trials and Biostatistics Unit; IRCCS Istituto Oncologico Veneto; Padova Italy
11. Department of Pediatric and Adolescent Medicine; Mayo Clinic and Foundation; Rochester Minnesota
12. Department of Pediatric Oncology; Emma Children's Hospital; Academic Medical Centre; Amsterdam The Netherlands
13. Department of Pediatric Oncology; Hospital Universitari Vall d'Hebron; Barcelona Spain
14. Department of Biostatistics; Gustave Roussy; Villejuif France
15. Department of Radiotherapy; Gustave Roussy; Villejuif France
16. Department of Pediatric and Adolescent Oncology; Centre Leon Berard; Lyon France
17. Department of Paediatric Oncology; Bristol Royal Hospital for Children; University of Bristol; Bristol United Kingdom
18. Division of Hematology/Oncology; Seattle Children's Hospital; University of Washington; Seattle Washington
19. Fred Hutchinson Cancer Research Center; University of Washington; Seattle Washington