1. Department of Pediatric Surgery; University Hospital of Saint-Etienne; Faculty of Medicine Jacques Lisfranc; PRES Lyon 42023; Jean Monnet University; Saint-Etienne France
2. Department of Pediatric Surgery; University Paris 7 Denis Diderot; Hôpital, Robert Debré; Assistance Publique-Hôpitaux de Paris; Paris France
3. Department of Surgical Oncology; CHU Lyon Sud; Hospices civils de Lyon; University of Lyon; Lyon; France
4. EMR 37-38; Lyon 1 University; Lyon France
5. Department of Pediatric; Adolescent and Young Adult Oncology; Institut Curie; Paris France
6. Department of Oncologic Surgery; Gustave Roussy; Cancer Center, Grand Paris; France
7. Departments of Oncology and Clinical Research; Centre Léon Berard and Institut d'Hématologie et d'Oncologie Pédiatrique; Lyon France
8. Department of Oncology for Child and Adolescents; Gustave Roussy; Cancer Center, Paris; France
9. Department of Digestive Surgery; University Paris 7 Denis Diderot; Hôpital Louis Mourier; Assistance Publique-Hôpitaux de Paris; Colombes France
10. Paediatric Surgery and Urology Department; Children University Hospital; Nantes France
11. Department of General and Digestive Surgery; Hautepierre Hospital; Strasbourg University Hospital; Strasbourg France
12. Department of Pediatric Surgery; Hautepierre Hospital; Strasbourg University Hospital; Strasbourg France
13. Pediatric Hematology-Oncology Department; Hôpital l'Archet; CHU de Nice; Nice France
14. Digestive Surgery and Oncological Department; Hospital Estaing; Clermont-Ferrand France
15. Department of Pediatric Surgery; Paris Descartes University; Hôpital Necker Enfants-Malades; Assistance Publique-Hôpitaux de Paris; Paris France