1. Department of Gynecology; Sørlandet Hospital Arendal; Arendal Norway
2. Research Unit; Sørlandet Hospital; Arendal Norway
3. Faculty of Medicine; University of Oslo; Oslo Norway
4. Department of Clinical Science; University of Bergen; Bergen Norway
5. Department of Gynecology and Obstetrics; Haukeland University Hospital; Bergen Norway
6. Department of Gynecological Oncology; Oslo University Hospital Radiumhospitalet; University of Oslo; Oslo Norway
7. Institute of Community Medicine; University of Tromsø; Tromsø Norway
8. Division of Gynecology and Obstetrics; Department of Obstetrics; Oslo University Hospital Rikshospitalet; Oslo Norway
9. Norwegian National Advisory Unit on Women's Health; Oslo University Hospital; Oslo Norway