1. Neonatal Unit Hôpital Jeanne de Flandre, Lille, France;
2. Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche S953, Epidemiological Research Unit on Perinatal Health and Women's and Children’s Health, Paris, France;
3. Université Pierre-et-Marie-Curie, Paris, France;
4. Institut National de la Santé et de la Recherche Médicale, Toulouse, France;
5. Paul-Sabatier University, Toulouse, France;
6. Centre Hospitalier Universitaire Purpan, Clinical Epidemiology Unit, Toulouse, France;
7. Department of Neonatal Medicine, Rouen University Hospital, Rouen, France;
8. Equipe Région-Institut National de la Santé et de la Recherche Médicale, ERI 28, NeoVasc, Institute for Biomedical Research and Innovation, Rouen University, Rouen, France;
9. Neonatal Unit Nancy University Hospital, Nancy, France;
10. NICU, Hopital Robert Debré, Assistance Publique Hopitaux de Paris et Université Paris Diderot, Paris, France;
11. Pediatrics Department, Besançon University Hospital, Franche-Comté University, Besançon, France;
12. Epidemiological and Clinical Research Unit, Beaujon Hospital, APHP, Clichy, France;
13. NICU and PICU Montpellier University Hospital, Hopital Arnaud de Villeneuve, Montpellier, France;
14. Department of Pediatrics, Hôpital du Bocage, Dijon, France;
15. Neonatal Unit, Centre Hospitalier Intercommunal Créteil, Université de Versailles Saint-Quentin, Poissy, France;
16. Department of Neonatology, Nantes University, Nantes, France;
17. Nantes University Institut National de la Santé et de la Recherche Médicale CIC004, Nantes, France; and
18. EA 9624 Epidemiological Research Unit on Quality of Care, Lille, France