Nathalie Bertille1,2,3, Gérard Pons4,5, Elisabeth Fournier-Charrière6, Babak Khoshnood7, Martin Chalumeau7,8. 1. Inserm U1153, Obstetrical, Perinatal and Pediatric Epidemiology Research Team (Epopé), Center for Epidemiology and Statistics, Sorbonne Paris Cité (CRESS), Paris Descartes University, Paris, France. nathalie.bertille@inserm.fr. 2. Sorbonne Universités, UPMC Univ Paris 06, IFD, Paris, France. nathalie.bertille@inserm.fr. 3. Department of General Paediatrics, Hôpital Necker-Enfants malades, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France. nathalie.bertille@inserm.fr. 4. Clinical Pharmacology, Groupe hospitalier Cochin-Broca-Hôtel Dieu, AP-HP, Paris Descartes University, Paris, France. 5. Inserm U663 Paediatric Epilepsies and Brain Plasticity, Paris, France. 6. Pain Center, Hôpital Bicêtre, AP-HP, Le Kremlin Bicêtre, France. 7. Inserm U1153, Obstetrical, Perinatal and Pediatric Epidemiology Research Team (Epopé), Center for Epidemiology and Statistics, Sorbonne Paris Cité (CRESS), Paris Descartes University, Paris, France. 8. Department of General Paediatrics, Hôpital Necker-Enfants malades, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France.