1. Department for Specialized Health Services Norwegian Board of Health Supervision Oslo Norway
2. Stavanger University Hospital and Western Norway University of Applied Sciences Stavanger Norway
3. Department of Obstetrics and Gynecology University Hospital of North Norway Tromsø Norway
4. Women´s Health and Perinatology Research Group Department of Clinical Medicine UiT The Arctic University of Norway Tromsø Norway
5. Division of Obstetrics and Gynecology Department of Clinical Science, Intervention and Technology Karolinska Institutet and Center for Fetal Medicine Department of Women’s Health Karolinska University Hospital Stockholm Sweden