1. Department of Cardiology P; Gentofte University Hospital; Niels Andersensvej 65, DK-2990 Hellerup Denmark
2. National Institute of Public Health; Denmark
3. Department of Medicine I; Bispebjerg University Hospital; Denmark
4. Rigshospitalet Heart Centre, Department of Medicine; Division of Cardiology B; Denmark
5. Department of Cardiology Y; Bispebjerg University Hospital; Copenhagen Denmark