1. Department of Paediatric Surgery and Abdominal Transplantation ,Cliniques Universitaires Saint‐Luc Brussels Belgium
2. SIREDO Oncology Center (Care, Innovation and Research for Children and AYA with Cancer), PSL Research University, Institut Curie Paris France
3. Department of pathology, University Hospital of Nantes Nantes France
4. Department of Pathology, Hôpital Robert Debré Paris France
5. Department of Paediatric Surgery, Hopital Armand Trousseau Paris France
6. Department of Pathology, Hopital Armand Trousseau Paris France
7. Department of Imaging, Institut Curie Paris France
8. Department of Imaging, Hopital Necker‐Enfants Malades Paris France
9. Department of Imaging, Institut Gustave Roussy Paris France
10. Department of Pathology, Hopital Kremlin Bicêtre, Pathology Paris France
11. Department of Paediatric Surgery, Hopital Robert Debré Paris France
12. Department of Imaging, Hopital Robert Debré Paris France
13. Institut Curie, Unité de Génétique Somatique Paris France
14. Department of Paediatric Surgery, Hôpital Kremlin Bicêtre Paris France
15. Department of Paediatric and Adolescent Oncology, INSERM U1015, Gustave Roussy, Université Paris‐Saclay Villejuif France
16. Department of Paediatric Surgery, Hôpital Universitaire Necker‐Enfants Malades, Université de Paris Paris France