1. Department of Public Health and General Practice; Norwegian University of Science and Technology; Trondheim Norway
2. Department of Health, Nutrition and Management; Faculty of Health Sciences; Oslo and Akershus University College of Applied Sciences; Oslo Norway
3. Center for Fetal Medicine and Pregnancy; Copenhagen University Hospital; Rigshospitalet; Copenhagen Denmark
4. Department of Women's and Children's Health; Division of Obstetrics and Gynecology; Karolinska Institute; Stockholm Sweden
5. Johns Hopkins University; School of Nursing; Baltimore Maryland USA
6. Department of Obstetrics and Gynecology; University of Tartu; Tartu University Hospital Women's Clinic; Tartu Estonia
7. Health Directorate; Reykjavik Iceland
8. Faculty of Nursing; Department of Midwifery; University of Iceland; Reykjavik Iceland
9. Department of Obstetrics and Gynecology; University of Tartu; Tartu Sexual Health Clinic; Tartu Estonia
10. Landspitali University Hospital; Reykjavik Iceland
11. Faculty of Health Sciences; Copenhagen University; Copenhagen Denmark
12. Faculty of Medicine and Health Sciences Ghent University; International Centre for Reproductive Health; Ghent Belgium
13. Malmö University; Faculty of Health and Society; Malmö Sweden
14. Department of Obstetrics and Gynecology; St Olav's University Hospital; Trondheim Norway