1. Division of Internal Medicine, University Hospital of North Norway, Norway
2. Cardiovascular Research Group, The Arctic University of Norway, Norway
3. Akershus University Hospital, Norway
4. Institute of Clinical Medicine, University of Oslo, Norway
5. Department of Community Medicine, The Arctic University of Norway, Norway
6. Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Norway
7. Clinic for Heart Disease, St Olavs University Hospital, Norway
8. Department of Heart Disease, University Hospital of North Norway, Norway