1. Department of Urology University of Texas Southwestern Medical Center Dallas Texas USA
2. Department of Pediatrics University of Texas Southwestern Medical Center Dallas Texas USA
3. Department of Pathology University of Texas Southwestern Medical Center Dallas Texas USA
4. Department of Urology I.M. Sechenov First Moscow State University Moscow Russia
5. Department of Pathology University of Cambridge Cambridge UK
6. Department of Histopathology Cambridge University Hospitals NHS Foundation Trust Cambridge UK
7. Department of Pediatric Hematology and Oncology Dana‐Farber Cancer Institute Boston Massachusetts USA
8. Department of Paediatric Hematology and Oncology Cambridge University Hospitals NHS Foundation Trust Cambridge UK
9. Cancer and Blood Disease Institute Children's Hospital Los Angeles Los Angeles California USA
10. Department of Urology University of California San Diego San Diego California USA