1. The Heart Centre, Copenhagen University Hospital, Denmark
2. Department of Cardiology, Herlev and Gentofte University Hospital, Denmark
3. Department of Cardiology, Aarhus University Hospital, Denmark
4. Department of Cardiology and Department of Cardiothoracic Surgery, Aalborg University Hospital, Denmark
5. Department of Cardiothoracic and Vascular Surgery, Odense University Hospital, Denmark
6. National Institute of Public Health, University of Southern Denmark, Denmark
7. Department of Cardiology, Odense University Hospital, Denmark