1. Department of Nursing Science; University of Turku; Turku Finland
2. National Institute for Health and Welfare; Turku Finland
3. Department of Geriatrics; University of Turku; Turku City Hospital; Turku Finland
4. Karolinska University Hospital Huddinge; Stockholm Sweden
5. Karolinska Institutet; Stockholm Sweden
6. Ministry of Social Affairs and Health; Helsinki Turku Finland
7. Turku University Hospital; Turku Finland