1. Departments of Obstetrics and Gynecology (S.S., I.C., E.V.), 7006 Trondheim, Norway
2. Department for Laboratory Medicine (S.S., E.V.), Children's and Women's Health, 7489 Trondheim, Norway
3. Endocrinology (S.M.C.), St Olav's Hospital, Trondheim University Hospital, 7006 Trondheim, Norway
4. Unit for Applied Clinical Research (S.M.C., Ø.S.), Department for Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, 7489 Trondheim, Norway