1. Division of Clinical Epidemiology, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
2. CHU Lille, Department of Neonatal Medicine, Jeanne de Flandre Hospital, Lille, France
3. Université de Paris, Epidemiology and Statistics Research Center/CRESS, INSERM (U1153-Obstetrical, perinatal and Pediatric Epidemiology Research Team (EPOPé)), INRA, Hôpital Tenon, Bâtiment Recherche, Rue de la Chine, Paris, France
4. Department of Clinical Science and Education, Södersjukhuset, Stockholm, Sweden