1. Department of Radiation Oncology Institut Curie, PSL Research University Paris France
2. Department of Radiation Oncology Institut Universitaire du Cancer de Toulouse ‐ Oncopole Toulouse France
3. Department of Hematology and Paediatric Oncology Centre Hospitalo‐Universitaire Estaing Clermont‐Ferrand France
4. Antenne Pédiatrique CIC INSERM 501 Clermont‐Ferrand France
5. Institute for Paediatric Haematology and Oncology Léon Bérard Cancer Center Lyon France
6. Department of Peadiatric Oncology Centre Hospitalier Universitaire Nantes Nantes France
7. Universitary Department of Radiation Oncology Centre Oscar Lambret Lille France
8. Faculté de Médecine Henri Warembourg Université de Lille Lille France
9. Laboratoire CRIStAL UMR 9186 Université de Lille Villeneuve d'ascq France
10. Department of Radiation Oncology Institut de Cancérologie de l'Ouest Nantes France
11. Centre de Recherche en Cancérologie Nantes Angers UMR 1232 Inserm ‐ 6299 CNRS Nantes France