1. Department of Pain Department of Community Medicine University Hospital of North Norway Tromsø Norway
2. Department of Community Medicine UiT The Arctic University of Norway Tromsø Norway
3. Division of Mental and Physical Health Norwegian Institute of Public Health Oslo Norway
4. Department of Pain Management and Research Division of Emergencies and Critical Care Oslo University Hospital Oslo Norway
5. Institute of Clinical Medicine University of Oslo Oslo Norway
6. Department of Computer Science UiT The Arctic University of Norway Tromsø Norway
7. School of Sport Sciences UiT The Arctic University of Norway Tromsø Norway