1. Department of Gastroenterological Surgery; University Hospital of North Norway; Tromsoe Norway
2. Department of Community Medicine; The Arctic University of Norway; Tromsoe Norway
3. Department of Gastroenterological Surgery; St Olav′s Hospital; Trondheim Norway
4. Department of Radiology; University Hospital of North Norway; Tromsoe Norway
5. Narvik University College; Narvik Norway
6. Institute of Clinical Medicine; The Arctic University of Norway; Tromsoe Norway
7. National Advisory Board of Continence and Pelvic Floor Health of Norway; University Hospital of North Norway; Tromsoe Norway