1. Department of Cardiology Medicine B; Hillerød University Hospital; DK-3400 Hillerød Denmark
2. Department of Cardiology; Glostrup University Hospital; DK-2600 Glostrup Denmark
3. Department of Cardiology; Gentofte University Hospital; DK-2900 Hellerup Denmark
4. Department of Cardiology and Endocrinology; Frederiksberg Hospital; DK-2000 Frederiksberg Denmark