1. Princess Máxima Center for Pediatric Oncology Utrecht The Netherlands
2. Department of Surgery, Division of Urology University of Colorado School of Medicine and the Surgical Oncology Program of the Children's Hospital Colorado Aurora Colorado USA
3. Reproductive Medicine and Gynaecology University Medical Center Utrecht Utrecht The Netherlands
4. Department of Urology Northwestern University Chicago Illinois USA
5. Great Ormond Street Hospital for Children NHS Foundation Trust London UK
6. Department of Surgery St. Jude Children's Research Hospital Memphis Tennessee USA
7. Department of Pediatrics—Patient Care MD Anderson Cancer Center Houston Texas USA
8. Division of Oncology at Children's National Hospital Washington District of Columbia USA
9. C.S. Mott Children's Hospital Section of Pediatric Surgery University of Michigan Ann Arbor Michigan USA
10. Department for Pediatric Oncology and Hematology Saarland University Medical Center Homburg Germany
11. Division of Pediatric Oncology Cincinnati Children's Hospital Medical Center, University of Cincinnati Cincinnati Ohio USA
12. Department of Radiation Oncology Northwestern University Chicago Illinois USA
13. Department of Urology University of Washington Seattle Washington USA
14. Division of Urology Seattle Children's Hospital Seattle Washington USA
15. Division of Pediatric General and Thoracic Surgery UPMC Children's Hospital of Pittsburgh Pittsburgh Pennsylvania USA
16. Department of Radiation Oncology The University of Texas MD Anderson Cancer Center Houston Texas USA
17. Department of Pediatric Oncology Children's Hospital Boston/Dana‐Farber Cancer Institute Boston Massachusetts USA
18. Department of Radiation Oncology University of Cincinnati Cincinnati Ohio USA
19. National Cancer Research Institute Children's Group Consumer Representative London UK
20. Departments of Surgery and Urology, IWK Health Centre Dalhousie University Halifax Canada
21. Department of Urology University of Kentucky Lexington Kentucky USA
22. Division of Hematology, Oncology, Neuro‐Oncology, and Stem Cell Transplant Ann & Robert H. Lurie Children's Hospital of Chicago Chicago Illinois USA
23. Children's Cancer Therapy Development Institute Beaverton Oregon USA
24. Department of Pediatric Hematology/Oncology IWK Health Centre and Dalhousie University Halifax Canada