1. Department of Pediatric and Adolescent Oncology Gustave Roussy (GR) Villejuif France
2. Department of Biopathology and Univ Lyon Université Claude Bernard Lyon 1 INSERM 1052 CNRS 5286 Cancer Research Center of Lyon Lyon France
3. Department of Translational Research and Innovation Centre Léon Bérard Lyon France
4. Department of Molecular Biology Institut Curie Paris France
5. Institut Curie SIREDO Oncology Center (Care, Innovation and research for children and AYA with cancer) PSL Research University Paris France
6. Department of Biostatistics Gustave Roussy (GR) Villejuif France
7. Department of Biopatholgy Necker Hospital Paris France
8. Department of Biopathology Trousseau Hospital Paris France
9. Department of Pediatric and Adolescent Oncology Centre Leon Berard Lyon France
10. French National Registry of Childhood Solid Tumors CHU Nancy France
11. CRESS UMRS1153 INSERM Université Paris‐Descartes Paris France
12. Department of Pediatric and Adolescent Hematogy and Oncology CHU Angers Angers France
13. Department of Pediatric Surgery CHU Bicetre AP‐HP Le Kremlin‐Bicêtre France
14. Department of Pediatric and Adolescent Hematogy and Oncology Trousseau Hospital (AP‐HP) Paris France
15. Department of Pediatric and Adolescent Hematogy and Oncology La Timone Hospital Marseille France
16. Department of Pediatric and Adolescent Hematogy and Oncology Nancy Hospital Nancy France
17. Department of Pediatric and Adolescent Hematogy and Oncology Pellegrin Hospital Bordeaux France
18. Department of Pediatric and Adolescent Oncology Oscar Lambret Centre Lille France
19. Department of Translational Research and Innovation Centre Léon Bérard Univ Lyon Université Claude Bernard Lyon 1 INSERM 1052 CNRS 5286 Cancer Research Center of Lyon Lyon France