1. Department of Research; Innlandet Hospital Trust; Brumunddal Norway
2. Cancer Registry of Norway; Institute of Population-based Cancer Research; Oslo Norway
3. Department of Research; Møre and Romsdal Hospital Trust; Ålesund Norway
4. Department of Gynecological Oncology; Oslo University Hospital; Radiumhospitalet; Oslo Norway
5. Faculty of Medicine; Department Group of Clinical Medicine; University of Oslo; Oslo Norway