1. Department of Community Medicine and Rehabilitation, Geriatric Medicine, Umeå University, Umeå, Sweden
2. Department of Nursing, Umeå University, Umeå, Sweden
3. Department of Surgical and Perioperative Science, Orthopaedics, Umeå University, Umeå, Sweden
4. Department of Public Health and Caring Sciences, Geriatric Medicine, Uppsala University, Uppsala, Sweden