1. INSERM; Obstetrical, Perinatal and Pediatric Epidemiology Research Team; Centre for Epidemiology and Biostatistics (U1153); Paris-Descartes University; Paris France
2. Clinical Epidemiology Unit; Department of Medicine Solna and Department of Women's and Children's Health; Karolinska Institutet; Stockholm Sweden
3. Clinical Care and Management Innovation Research Area; Bambino Gesù Children's Hospital; IRCCS, Rome Italy
4. EPIUnit-Institute of Public Health; University of Porto; Porto Portugal
5. Department of Clinical Epidemiology, Predictive Medicine and Public Health; University of Porto Medical School; Porto Portugal
6. Department of Neonatology; Antwerp University Hospital; University of Antwerp; Edegem and Study Centre for Perinatal Epidemiology Flanders; Brussel Belgium
7. Poznan University of Medical Sciences; Poznan Poland
8. Université Paris V René Descartes and Assistance Publique Hôpitaux de Paris; Hôpitaux Universitaire Paris Centre Site Cochin; Service de Médecine et Réanimation néonatales de Port-Royal; Paris France
9. Children's Hospital; University Hospital; University of Saarland; Homburg/Saar Germany
10. Department of Health Sciences; University of Leicester; Leicester UK
11. Children's Hospital; University Hospital; Philipps University; Marburg Germany