1. Department of Pain Management and Research Oslo University Hospital Oslo Norway
2. Institute of Clinical Medicine, Faculty of Medicine University of Oslo Oslo Norway
3. Quantify Research Stockholm Sweden
4. Institute of Health and Society, Faculty of Medicine University of Oslo Oslo Norway
5. Department of Neurobiology, Care Sciences and Society Karolinska Institutet Stockholm Sweden
6. Department of Community Medicine UiT The Arctic University of Norway Tromsø Norway
7. Department of Chronic Diseases and Ageing Norwegian Institute of Public Health Oslo Norway