1 Department of Women's and Children's health, Karolinska Institutet, Stockholm, Sweden.
2 Women's Health and Perinatology Research Group, Department of Clinical Medicine, Faculty of Health Sciences, UiT-The Arctic University of Norway, Tromsø, Norway.
3 Department of Obstetrics and Gynecology, University Hospital of North Norway, Tromsø, Norway.
4 Department of Clinical Sciences, Intervention and Technology, Karolinska Institute, Stockholm, Sweden.
5 Center for Fetal Medicine, Karolinska University Hospital, Stockholm, Sweden.