1. Department of Obstetrics and Gynecology Leiden University Medical Center Leiden the Netherlands
2. National Center for Disease Prevention and Health Promotion Istituto Superiore di Sanità — Italian National Institute of Health Rome Italy
3. 1st Department of Obstetrics and Gynecology Faculty of Medicine Comenius University Bratislava Slovakia
4. Department of Obstetrics Rigshospitalet University Hospital Copenhagen Denmark
5. Inserm U1153 Obstetric, Perinatal and Pediatric Epidemiology Research Team Center for Epidemiology and Statistics Sorbonne Paris Cite Paris University Paris France
6. Information Services Department THL Finnish Institute for Health and Welfare Helsinki Finland
7. Department of Neurobiology, Care Sciences and Society Karolinska Institute Stockholm Sweden
8. Department of Obstetrics and Gynecology Hyvinkää hospital HUCHUniversity of Helsinki Helsinki Finland
9. National Perinatal Epidemiology Unit University of Oxford Oxford UK
10. Clinical Science and Education Department of Obstetrics and Gynecology Karolinska InstituteSodersjukhuset Hospital Stockholm Sweden
11. Department of Obstetrics and Gynecology Ghent University Hospital Ghent Belgium
12. Athena InstituteVU University Amsterdam The Netherlands