1. Department of Cardiology, Aarhus University Hospital, Aarhus N, Denmark
2. Danish Center for Clinical Health Services Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital, Aalborg, Denmark
3. Centre for Cardiac, Vascular, Pulmonary and Infectious Diseases, Rigshospitalet, Copenhagen University Hospital, Copenhagen Ø, Denmark
4. Department of Clinical Medicine, University of Copenhagen, Copenhagen N, Denmark
5. Department of Cardiology, Herlev and Gentofte University Hospital, Gentofte, Denmark
6. Department of Cardiothoracic and Vascular Surgery, Odense University Hospital, Odense C, Denmark
7. Department of Cardiology, Odense University Hospital, Odense C, Denmark
8. Department of Clinical Research, University of Southern Denmark, Odense C, Denmark
9. Department of Cardiology, Cardiothoracic Surgery and Clinical Nursing Research Unit, Aalborg University Hospital, Aalborg, Denmark