1. Division of Orthopaedic Surgery, Oslo University Hospital, Oslo, Norway
2. Division of Mental and Physical Health, Norwegian Institute of Public Health, Bergen, Norway
3. Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
4. Division for Health Services, Norwegian Institute of Public Health, Oslo, Norway
5. Department of Hand Surgery, Tampere University Hospital, Tampere, Finland
6. Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland