1. Centre de Recherche Épidémiologie et Statistique Sorbonne Paris Cité (CRESS), Inserm UMR1153, Paris Descartes University; Obstetrical, Perinatal and Pediatric Epidemiology Research Team (EPOPé); Paris France
2. Necker Hospital, AP-HP and Paris Descartes University; Department of Pediatrics; Paris France
3. Association Clinique et Thérapeutique Infantile du Val-de-Marne (ACTIV); 27 Rue Inkermann Saint-Maur-des-Fossés France
4. Centre Hospitalier Intercommunal de Créteil (CHIC); Department of Microbiology; 40 avenue de Verdun Créteil France 94010