1. Department of Surgery, Umeå University,
Umeå, Sweden
2. Department of Public Health and Clinical Medicine/Rheumatology, Umeå University Hospital,
Umeå, Sweden
3. Department of Medical Sciences, Uppsala University Hospital,
Uppsala, Sweden
4. Department of Public Health and Caring Sciences/Section of Geriatrics, Uppsala University,
Uppsala, Sweden
5. School of Health and Social Studies, Dalarna University,
Falun, Sweden