1. Department of Pediatric Surgery University Hospitals Bristol and Weston NHS Foundation Trust Bristol UK
2. Hematology Oncology Division Department of Women's and Children's Health Padova University Hospital Padua Italy
3. Hematology Oncology Division Department of Women's and Children's Health University of Padova Padua Italy
4. Department of Pediatric Surgery University Paris‐Saclay Bicêtre Hospital Paris France
5. Department of Pediatric Oncology University Hospital of Wales Cardiff UK
6. Department of Pediatric and Adolescent Oncology Gustave Roussy Villejuif France
7. Princess Máxima Center for Pediatric Oncology Utrecht The Netherlands
8. Department of Radiation Oncology University Medical Center Utrecht Utrecht The Netherlands
9. Department of Pathology Central Manchester University Hospitals Manchester UK
10. The Royal Marsden Hospital and the Institute of Cancer Research Sutton UK
11. Department of Paediatric Surgery Vall d'Hebron University Hospital Barcelona Spain
12. Department of Paediatric Research Division of Paediatric and Adolescent Medicine Oslo University Hospital Oslo Norway
13. Pediatric Surgery Unit, Department of Women's and Children's Health Padova University Hospital Padua Italy