1. Division of Pediatric SurgeryUniversity of Munich Munich Germany
2. Division of Pediatric Hematology and OncologyUniversity of California San Francisco San Francisco California
3. Department of Preventive MedicineUniversity of Southern CaliforniaCalifornia Los Angeles
4. Department of Surgery for Children and AdolescentsMedical University of Gdansk Gdansk Poland
5. Department of Pediatric SurgeryHiroshima University Hiroshima Japan
6. IBCSG Coordinating Center Bern Switzerland
7. Department of Pathology and ImmunologyBaylor College of Medicine Houston Texas
8. Department of Pediatric SurgeryUniversity Children's Hospital Zurich Zurich Switzerland
9. Department of PathologyBambino Gesu Pediatric Hospital Roma Italy
10. Pediatric DepartmentOnco‐Hematology UnitGeneva University Hospital Geneva Switzerland
11. Division of Pediatric Hematology OncologyUniversity of California Davis Comprehensive Cancer CenterCalifornia Sacramento
12. Department of PediatricsUniversity of Padua Padua Italy
13. Department of Pediatric OncologyDana‐Farber Cancer InstituteBoston Children's Hospital and Harvard Medical School Boston Massachusetts
14. Department of Pediatric Hematology/OncologyProvidence Sacred Heart Children's Hospital Spokane Washington
15. Department of Hematology and OncologyShizuoka Children's Hospital Shizuoka Japan
16. Department of Pediatric Hematology and OncologyUniversity of Munich Munich Germany
17. Division of Pathology and Laboratory MedicineCincinnati Children's Hospital Mediacla Center Cincinnati Ohio
18. Innovative Clinical Research Center (iCREK)Kanazawa University Hospital Japan
19. Department of Pediatric SurgeryChiba University Graduate School of Medicine Chiba Japan
20. Department of PathologyKanagawa Children's Medical Center Yokohama Japan
21. Children's Oncology Group Los Angeles California
22. CINECA Bologna Italy
23. Division of Pediatric SurgeryUniversity of Utah School of MedicineUtah Salt Lake City