1. Department of Paediatric Surgery University Hospitals Bristol NHS Foundation Trust Bristol UK
2. Department of Pediatric Surgery University Hospital Giessen‐Marburg Marburg Germany
3. Department of Pediatric Surgery and Pediatric Urology University Children's Hospital Tuebingen Germany
4. Department of Paediatric Surgery, Bicêtre Hospital, Assistance Publique‐Hôpitaux de Paris Hôpitaux Universitaires Paris‐Saclay Le Kremlin Bicêtre Paris France
5. Division of Pediatric General and Thoracic Surgery Cincinnati Children's Hospital Medical Center Cincinnati Ohio USA
6. Departments of Surgery and Pediatrics Duke University School of Medicine Durham North Carolina USA
7. Division of Hematology/Oncology, Seattle Children's Hospital, Fred Hutchinson Cancer Research Center University of Washington Seattle Washington USA
8. Klinikum Stuttgart, Zentrum für Kinder‐, Jugend‐ und Frauenmedizin, Olgahospital Pediatrics 5 (Pediatric Oncology Hematology and Immunology) Stuttgart Germany
9. Hematology and Oncology Division, Department of Women's and Children's Health Padova University Hospital Padua Italy
10. Division Pediatric Surgery East Carolina University Greenville North Carolina USA