1. Department of Cardiology, Copenhagen University Hospital Herlev and Gentofte, Post 635, Kildegaardsvej 28, 2900 Hellerup, Denmark
2. The Danish Heart Foundation, Vognmagergade 7, 1120 Copenhagen, Denmark
3. Department of Cardiology, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 3, 2100 København Ø, Denmark
4. The National Institute of Public Health, University of Southern Denmark, Øster Farimagsgade 5A, 1353 Copenhagen, Denmark