1. Department of Obstetrics and Gynaecology, Skåne University Hospital MalmöLund University Malmö Sweden
2. Campus Helsingborg, Clinical Science Faculty of MedicineLund University Helsingborg Sweden
3. Department of Obstetrics and Gynecology, St. Olavs HospitalTrondheim University Hospital Trondheim Norway
4. Department of Clinical and Molecular MedicineNorwegian University of Science and Technology Trondheim Norway