1. Obstetrical, Perinatal and Pediatric Epidemiology Research team, Centre of Research in Epidemiology and Statistics, Université de Paris, INSERM, F-75004, Paris, France
2. Inserm CIC 1413, Nantes University Hospital, F-44000, Nantes, France
3. Department of General Pediatrics and Pediatric Infectious Diseases, AP-HP, Necker-Enfants Malades Hospital, Université de Paris, F-75015, Paris, France
4. Unité d’Accueil des Enfants en Danger, Nantes University Hospital, F-44000, Nantes, France
5. Department of Pediatric Radiology, AP-HP, Bicêtre Hospital, F-94270, Le Kremlin Bicêtre, France
6. Pediatrics and Forensic Unit, AP-HP, Hôtel-Dieu Hospital, F-75004, Paris, France
7. AFPA, Association Française de Pédiatrie Ambulatoire, F-30400, Villeneuve les Avignons, France
8. Department of Pediatric Emergency Care, Nantes University Hospital, F-44000, Nantes, France
9. and the European Confederation of Primary Care Paediatricians (ECPCP) research group