1. Gerontology Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
2. School of Health and Social Studies, JAMK University of Applied Sciences, Jyväskylä, Finland
3. Department of Medical Rehabilitation, Oulu University Hospital, Oulu, Finland
4. Center for Life Course Epidemiology Research, University of Oulu, Oulu, Finland