1. Department of Pediatric Surgery, Ann and Robert H. Lurie Children's Hospital of Chicago Northwestern University Chicago Illinois
2. Department of Pediatric Surgery, Bicetre Hospital, Assistance Publique‐Hopitaux de Paris Hopitaux Universitaires Paris‐Sud Le Kremlin Bicetre France
3. Department of Pediatric Surgery and Pediatric Urology University Children's Hospital Tubingen Germany
4. Department of Radiotherapy Brachytherapy Unit, Gustave Roussy Cancer Campus Villejuif France
5. Department of Pediatric Urology Great Ormond Street Hospital NHS Foundation Trust London UK
6. Department of Urology Mayo Clinic Rochester Minnesota
7. Department of Radiation Oncology Memorial Sloan Kettering Cancer Center New York New York
8. Klinikum Stuttgart Zentrum für Kinder‐, Jugend‐, und Frauenmedizin, Olgahospital Pediatrics 5 Stuttgart Germany
9. Hematology/Oncology Division, Seattle Children's Hospital, Fred Hutchinson Cancer Research Center University of Washington Seattle Washington
10. Hematology and Oncology Division, Department of Women's and Children's Health Padova University Hospital Padova Italy
11. Division Pediatric Surgery East Carolina University Greenville North Carolina
12. Department of Pediatric Surgery University Hospital Giessen‐Marburg Marburg Germany