1. Department of Pediatric SurgeryUniversity Hospital Center of Reims Reims France
2. Pediatric and AYA Oncology DepartmentCentre Oscar Lambret Lille France
3. Department of Pediatric SurgeryKremlin‐Bicêtre Hospital Paris France
4. Department of RadiologyCurie Institute Paris France
5. Department of Pediatric SurgeryArmand Trousseau Hospital, APHP Paris France
6. Pediatric Hematology‐Oncology DepartmentLa Timone Hospital, AP‐HM Marseille France
7. Department of Pediatric SurgeryNecker Enfants Malades Hospital Paris France
8. Pediatric Onco‐Hematology DepartmentUniversity Hospital Center of Nantes Nantes France
9. Department of PathologyArmand Trousseau Hospital, APHP Paris France
10. Pediatric Onco‐Hematology DepartmentUniversity Hospital Center of Bordeaux Bordeaux France
11. Pediatric Onco‐Hematology DepartmentCurie Institute Paris France
12. Pediatric Onco‐Hematology DepartmentArmand Trousseau Hospital, APHP Paris France
13. Pediatric Hematology‐Oncology DepartmentUniversity Hospital Center of Toulouse Toulouse France
14. Pediatric Hematology‐Oncology DepartmentUniversity Hospital Center of Angers Angers France
15. Pediatric Hematology‐Oncology DepartmentUniversity Hospital Center of Grenoble Grenoble France
16. Department of PathologyHospices Civiles de Lyon Lyon France
17. Department of StatisticCentre Léon Bérard Lyon France
18. Pediatric Onco‐Hematology DepartmentCentre Leon Bérard/ IHOPE Lyon France
19. Children and Adolescents Oncology DepartmentGustave Roussy Villejuif France