1. INSERM, UMR 953, Epidemiological Research in Perinatal Health and Women's and Children Health, Bâtiment de recherche, Hôpital Tenon, Paris, France;
2. Assistance Publique-Hôpitaux de Paris [APHP], Réanimation Néonatale et Pédiatrique, Hôpital Trousseau, Paris, France;
3. UPMC, Université Paris, Paris, France;
4. Assistance Publique-Hôpitaux de Paris, Service de Neonatologie, Hôpital Necker Enfants Malades, Paris, France;
5. Department of Neonatology, Children Hospital, Nantes, France;
6. Neonatal Medicine, University Hospital, Rouen, France;
7. Institute of Biomedical Research, INSERM Group, IFR 23, Rouen, France; and
8. A. Pinard Maternity Hospital, Nancy, France