1. Department of Cardiology, Aalborg University Hospital, Hobrovej 18-22, 9000 Aalborg, Denmark
2. Unit of Epidemiology and Biostatistics, Aalborg University Hospital, Søndre Skovvej 15, 9000 Aalborg, Denmark
3. Department of Clinical Research, Nordsjællands Hospital, Dyrehvaevej 29, 3400 Hillerød, Denmark
4. Department of Clinical Medicine, Aalborg University, Søndre Skovvej 15, 9000 Aalborg, Denmark
5. Division of Cardiology, Duke University Medical Center, Erwin Road, Durham, NC 27710, USA
6. Department of Cardiology, Copenhagen University Hospital Gentofte, Gentofte Hospitalsvej 1, 2900 Hellerup, Denmark
7. Department of Cardiology, Hjørring Regional Hospital, Bispensgade 37, 9800 Hjørring, Denmark