Affiliation: | 1. Department of Obstetrics and Gynecology, Innlandet Hospital Trust, Gjøvik, Norway;2. Department of Clinical Medicine, University of Tromsø, Tromsø, Norway;3. Department of Community Medicine, University of Tromsø, Tromsø, Norway;4. Department of Obstetrics and Gynecology, University Hospital of North Norway, Tromsø, Norway;5. Department of Neurology and Neurophysiology, University Hospital of North Norway, Tromsø, Norway |