1. Department of Clinical Neuroscience, Occupational Therapy and Elderly Care Research, Division of Geriatric Medicine, Karolinska Institute/Huddinge Hospital, Stockholm
2. Department of Community Health, County Council of Västerbotten, UmeÅ
3. Department of Internal Medicine, University Hospital of Northern Sweden, UmeÅ, Sweden,
4. Department of Medical Biosciences, Clinical Chemistry, University Hospital of Northern Sweden, UmeÅ, Sweden
5. Family Medicine, University Hospital of Northern Sweden, UmeÅ, Sweden