1. Department of Obstetrics & Gynaecology Ghent University Hospital Ghent Belgium
2. Department of Obstetrics, Birth Centre Wilhelmina's Children Hospital, Division Woman and Baby University Medical Centre Utrecht Utrecht The Netherlands
3. Centre for Quality and Management in Health Care Medical Association of Lower Saxony Hannover Germany
4. Department of Obstetrics, Rigshospitalet University Hospital of Copenhagen Copenhagen Denmark
5. Université Paris Cité, Obstetrical, Perinatal and Paediatric Epidemiology Research Team (EPOPé) Centre for Epidemiology and Statistics, Inserm U1153 Paris France
6. National Centre for Disease Prevention and Health Promotion Istituto Superiore di Sanità‐(Italian National Institute of Health) Rome Italy
7. Department of Knowledge Brokers THL Finnish Institute for Health and Welfare Helsinki Finland
8. Department of Molecular Medicine and Surgery Karolinska Institute Stockholm Sweden
9. Academic Primary Health Care Centre Stockholm Sweden
10. National Perinatal Epidemiology Unit University of Oxford Oxford UK
11. Department of Clinical Science and Education Karolinska Institute, Södersjukhuset Stockholm Sweden
12. Department of Obstetrics and Gynaecology Södersjukhuset Stockholm Sweden
13. Department of Gynaecology and Obstetrics Clinic Ottakring, Vienna Healthcare Group Vienna Austria
14. Athena Institute VU University Amsterdam Amsterdam The Netherlands
15. Department of Obstetrics Leiden University Medical Centre Leiden The Netherlands
16. Department of Obstetrics and Gynaecology Deventer Hospital Deventer The Netherlands