1. Assistance Publique‐Hôpitaux de Paris Neonatal Intensive Care Unit, Robert Debré Children's Hospital Paris France
2. Assistance Publique‐Hôpitaux de Paris, Unit of Clinical Epidemiology Robert Debré Children's Hospital, University of Paris, Institut National de la Santé et de la Recherche Médicale U1123 and CIC‐EC 1426 Paris France
3. Institut National de la Santé et de la Recherche Médicale U1141 University of Paris Paris France
4. Division of Neonatology and Pediatric Intensive Care Children's University Hospital of Geneva and University of Geneva Geneva Switzerland