1. Department of Public Health and General Practice Faculty of Medicine Norwegian University of Science and Technology Trondheim Norway
2. Hysnes Rehabilitation Centre St. Olav's University Hospital Rissa Norway
3. HUNT Research Centre Department of Public Health and General Practice Faculty of Medicine Norwegian University of Science and Technology Levanger Norway
4. Forensic Department and Research Centre Bröset St. Olav's University Hospital Trondheim Trondheim Norway