1. Research and Development; Mikkeli University of Applied Sciences; Mikkeli Finland
2. Gerontology Research Center and Department of Health Sciences; University of Jyväskylä; Jyväskylä Finland
3. Department of Medical Rehabilitation; Oulu University Hospital; Oulu Finland
4. Department of Orthopedics and Traumatology; University of Helsinki and Helsinki University Hospital; Helsinki Finland
5. Institute of Health Sciences; University of Oulu; Oulu Finland
6. Service Line of General Practice and Geriatrics; Hatanpää Hospital; Tampere Finland
7. Department of Physical and Rehabilitation Medicine; Central Finland Central Hospital; Jyväskylä Finland