1. Department of Obstetrics Leiden University Medical Centre Leiden The Netherlands
2. Port‐Royal Maternity Unit, Cochin Hospital Assistance Publique‐Hôpitaux de Paris Paris France
3. Université Paris Cité, Inserm, Obstetrical, Perinatal and Paediatric Epidemiology Research Team (Epopé), CRESS Paris France
4. Department of Gynaecology and Obstetrics University Hospital of Lausanne Lausanne Switzerland
5. Departments of Medicine & ObGyn Brown University Providence Rhode Island USA
6. National Centre for Disease Prevention and Health Promotion Istituto Superiore di Sanità—Italian National Institute of Health Rome Italy
7. National Perinatal Epidemiology Unit, Nuffield Department of Population Health University of Oxford Oxford UK
8. Departments of Obstetrics & Gynaecology and Health Research Methods Evidence and Impact McMaster University Hamilton Canada
9. Department of Obstetrics and Gynaecology, Lunenfeld Tanenbaum Research Institute, Mount Sinai Hospital University of Toronto Toronto Ontario Canada
10. Athena Institute VU University Amsterdam The Netherlands