1. Department of Cardiology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
2. Department of Cardiology, Roskilde Hospital, Roskilde, Denmark
3. Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark
4. Department of Cardiology, Skejby University Hospital, Skejby, Denmark
5. Department of Cardiology, Odense University Hospital, Odense, Denmark
6. Department of Clinical Epidemiology, Aalborg University Hospital, Aalborg, Denmark
7. Department of Biomedical Sciences, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark