1. Department of Health and Care Sciences, Faculty of Health Sciences, UiT - The Arctic University of Norway, Tromsø, Norway
2. Division of Medicine, Department of Cardiology, Nordland Hospital, Bodø, Norway
3. Department of Clinical Medicine, Faculty of Health Sciences, UiT - The Arctic University of Norway, Tromsø, Norway
4. Department of Cardiology, University Hospital of North Norway, Tromsø, Norway