1. Faculty of Health and Social Sciences Western Norway University of Applied Sciences Bergen Norway
2. Department of Clinical Science University of Bergen Bergen Norway
3. Center for Fertility and Health Norwegian Institute of Public Health Oslo Norway
4. Department of Obstetrics and Gynecology Haukeland University Hospital Bergen Norway
5. Center for Clinical Research Dalarna Uppsala University Uppsala Sweden
6. Department of Women’s and Children’s Health Karolinska Institute Solna Sweden