1. The Fracture Registry of Western Norway (FReWN), Stavanger University Hospital Stavanger Norway
2. Department of Orthopaedic Surgery Stavanger University Hospital Stavanger Norway
3. Department of Public Health The Faculty of Health Sciences, University of Stavanger Stavanger Norway
4. Department of Clinical Medicine Faculty of Medicine, University of Bergen Bergen Norway
5. Department of Research Stavanger University Hospital Stavanger Norway