1. Division of Obstetrics and Gynecology Department of Clinical Science, Intervention and Technology Karolinska Institutet and Center for Fetal Medicine Karolinska University Hospital Stockholm Sweden
2. Women’s Health and Perinatology Research Group Department of Clinical Medicine UiTThe Arctic University of Norway Tromsø Norway
3. Department of Women’s and Chidren’s Health Karolinska Institutet and Karolinska University Hospital Stockholm Sweden
4. Department of Obstetrics and Gynecology University of Helsinki and Helsinki University Hospital Helsinki Finland
5. Department of Clinical Research University of Southern Denmark Odense Denmark
6. Department of Obstetrics and Gynecology Odense University Hospital Odense Denmark