1. Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
2. Assistive Technology Centre, Central Finland Health Care District, Jyväskylä, Finland
3. Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
4. Primary Health Care Unit, Kuopio University Hospital, Kuopio, Finland
5. Folkhälsan Research Center, Helsinki, Finland
6. Old Age Psychiatry, Department of Psychiatry, Helsinki University and Helsinki University Hospital, Helsinki, Finland
7. School of Health and Social Studies, JAMK University of Applied Sciences, Jyväskylä, Finland