1. Department of Cardiology, Aalborg University Hospital , Hobrovej 18-22 Aalborg , Denmark
2. Department of Public Health, Faculty of Health and Medical Sciences, University of Copenhagen , Blegdamsvej 3B, 2200 Copenhagen , Denmark
3. Center for Clinical Research and Prevention, Bispebjerg and Frederiksberg Hospital , Nordre Fasanvej 57, Hovedvejen, Entrance 5, 2000 Frederiksberg , Denmark
4. Centre of General Practice, Department of Public Health, University of Copenhagen , Copenhagen , Denmark
5. The Research Unit for General Practice in Region Zealand , Copenhagen , Denmark
6. The Research Unit for General Practice, Department of Social Medicine, University of Tromsø , Tromsø , Norway