1. Department of Cardiology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
2. Duke Clinical Research Institute, Durham, North Carolina
3. Department of Cardiothoracic Surgery, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
4. Department of Cardiology, Herlev and Gentofte University Hospital, Hellerup, Denmark
5. The Danish Heart Foundation, Copenhagen, Denmark
6. The National Institute of Public Health, University of Southern Denmark, Odense, Denmark
7. Department of Health Science and Technology, Aalborg University, Aalborg, Denmark