1. Division of Internal Medicine, University Hospital of North Norway, Harstad, Norway
2. Department of Health and Care Sciences, The Arctic University of Norway, Harstad, Norway
3. Department of Heart Disease, Haukeland University Hospital, Bergen, Norway
4. School for Health and Welfare, Jönköping University, Sweden
5. Institute of Nursing, Faculty of Health and Social Science, Bergen University College, Norway
6. Department of Clinical Science, University of Bergen, Norway
7. Centre for Clinical Research, Haukeland University Hospital, Bergen, Norway
8. Department of Cardiology, Stavanger University Hospital, Norway
9. Kavli Research Centre for Geriatrics and Dementia, Haraldsplass Deaconess Hospital, Bergen, Norway