1. Department of Internal Medicine, Cardiology Section, Holbaek Hospital , Holbaek , Denmark
2. Department of Regional Health Research, The Faculty of Health Sciences, University of Southern Denmark , Odense , Denmark
3. Department of Cardiology and Nephrology, Ullevaal Hospital, University of Oslo , Oslo , Norway
4. Division of Cardiology, Department of Medicine, Weill Cornell Medicine , New York, New York , USA
5. Department of Clinical Science, University of Bergen , Bergen , Norway