1. The Norwegian Continence and Pelvic Floor Centre; University Hospital of North Norway; Tromsø Norway
2. Women's Health and Perinatology Research Group, Department of Clinical Medicine, Faculty of Health Sciences; University of Tromsø; Tromsø Norway
3. Department of Obstetrics and Gynaecology; University Hospital of North Norway; Tromsø Norway
4. National Institute for Health and Welfare (THL); Helsinki Finland
5. Nordic School of Public Health; Gothenburg Sweden
6. Department of Clinical Research; University Hospital of North Norway; Tromsø Norway