1. Department of Nursing; Stord/Haugesund University College; Stord Norway
2. Department of Neurobiology; Care Sciences and Society, Karolinska Institute; SE-141 83 Huddinge Sweden
3. Department of Nursing; Sogn & Fjordane University College; Sogndal Norway
4. Department of Health Studies; University of Stavanger; Stavanger Norway
5. Stavanger Hospital; Karolinska Institute, NVS; Novum Sweden
6. Department of Old Age Psychiatry; Oslo University Hospital; Oslo Norway
7. Wolfson Centre for Age-Related Diseases; King's College London; London UK
8. Psychiatry; Helse Fonna; Haugesund Norway
9. Department of Clinical Medicine; The University of Bergen; Bergen Norway