Ane Erdal1, Dagrun D Slettebo2, Bettina S Husebo2,3. 1. Department of Global Public Health and Primary Care, Centre for Elderly and Nursing Home Medicine, University of Bergen, PO Box 7804, 5020, Bergen, Norway. ane.erdal@uib.no. 2. Department of Global Public Health and Primary Care, Centre for Elderly and Nursing Home Medicine, University of Bergen, PO Box 7804, 5020, Bergen, Norway. 3. Department of Health and Care, Municipality of Bergen, Bergen, Norway.