1. Department of Surgery, Nordland Hospital Trust , Bodø , Norway
2. Institute of Clinical Medicine, University of Tromsø , Tromsø , Norway
3. Department of Ophthalmology, University hospital of Tromsø , Tromsø , Norway
4. Department of Research, Nordland Hospital Trust , Bodø , Norway
5. Department of Surgery, Ullevål University Hospital , Oslo , Norway
6. Department of Hepatopancreatobiliary Surgery, Intervention Centre, Oslo University Hospital, Oslo, Norway
7. Institute of Clinical Medicine, University of Oslo , Oslo , Norway
8. Institute of Computer Science, University of Tromsø , Tromsø , Norway
9. Department of Surgery, Akershus University Hospital , Oslo , Norway
10. Division of Surgery, Campus Ahus, University of Oslo , Oslo , Norway