1. Department of Cardiology, Rigshospitalet, Copenhagen University Hospital , Inge Lehmanns Vej 7, 2100 Copenhagen , Denmark
2. Department of Clinical Epidemiology, Aarhus University Hospital , Oluf Palmes Allé 43-45, 8200 Aarhus , Denmark
3. Department of Cardiology, Aarhus University Hospital , Palle Juul-Jensens Boulevard 99, 8200 Aarhus , Denmark
4. Department of Cardiology, Odense University Hospital , J. B. Winsløwsvej 4, 5000 Odense , Denmark
5. Department of Cardiology, Nordsjællands Hospital , Dyrehavevej 29, 3400 Hillerød , Denmark
6. Department of Cardiology, Aalborg University Hospital , Hobrovej 18-22, 9000 Aalborg , Denmark
7. Department of Public Health, University of Copenhagen , Øster Farimagsgade 5, 1353 Copenhagen , Denmark
8. Department of Cardiology, Herlev and Gentofte Hospital, Copenhagen University Hospital , Gentofte Hospitalsvej 1, 2900 Hellerup , Denmark
9. The Danish Heart Foundation , Vognmagergade 7, 1120 Copenhagen , Denmark