1. Department of Nursing Science, School of Health and Welfare, Jönköping University, Jönköping, Sweden
2. Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Huddinge, Sweden
3. Department of Geriatrics, County Hospital Ryhov, Jönköping, Sweden
4. Department of Health, Medicine and Caring Sciences, Linköping University, Sweden.;
5. School of Health and Welfare, Institute of Gerontology, Jönköping University, Jönköping, Sweden
6. Center for Economic and Social Research, University of Southern CA, Los Angeles, CA, USA