1. Epidemiology and Population Health Center, Institut National de la Santé et de la Recherche Médicale (INSERM)Le Kremlin‐BicêtreU1018France
2. Epidemiology of Childhood and Adolescent Cancers Team (EPICEA)Université Paris Descartes, Epidemiology and Biostatistics, INSERM UMR1153, Sorbonne Paris Cité Research CenterVillejuif, France
3. French National Registry of Childhood CancersVillejuif France
4. Gynecology and Obstetrics DepartmentHôpital Louis Mourier, Hôpitaux Universitaires Paris Nord Val de Seine, AP‐HPColombes, France
5. Infectious Diseases DepartmentHôpital Pitié Salpétrière, Assistance Publique‐Hôpitaux de Paris (AP‐HP)Paris, France
6. Pediatric DepartmentHôpital Trousseau, AP‐HPParis, France
7. Pediatric DepartmentHôpital Robert Debré, AP‐HP, Université Paris Diderot, Sorbonne Paris‐CitéParis, France
8. Hôpital Bicêtre, AP‐HP, Université Paris SudLe Kremlin‐Bicêtre, France
9. Immunology Hematology Rheumatology Unit, Pediatric DepartmentHôpital Necker‐Enfants Malades AP‐HP, Université Paris DescartesParis France