1. Department of Pediatric SurgeryUniversity Hospital of Saint‐Etienne Saint‐Priest‐en‐Jarez France
2. Department of Pediatric SurgeryUniversity Hospital of Rennes Rennes France
3. SIREDO Oncology CenterInstitut Curie PSL University Paris France
4. Department of Pediatric Hematology and OncologyLa Timone Children's Hospital Marseille France
5. Department of Pediatric OncologyUniversity Hospital of Saint‐Etienne Saint‐Priest‐en‐Jarez France
6. Department of Adult Surgical OncologyUniversity Hospital of Lyon Lyon France
7. Department of Digestive SurgeryStrasbourg University Strasbourg France
8. Department of Children and Adolescents OncologyInstitut Gustave Roussy Paris France
9. Department of Pediatric SurgeryUniversity Hospital of Reims Reims France
10. Department of PathologyUniversity Hospital of Saint‐Etienne Saint‐Priest‐en‐Jarez France