1. Department of Cardiology, Odense University Hospital, Denmark
2. Department of Health Sciences, Department of Clinical Research, University of Southern Denmark, Denmark
3. Department of Cardiology and Department of Cardiothoracic Surgery and Clinical Nursing Research Unit, Aalborg University Hospital, Denmark
4. Department of Cardiology, Herlev and Gentofte University Hospital, Denmark
5. Department of Cardiothoracic and Vascular Surgery, Odense University Hospital, Denmark
6. The Heart Centre, Rigshospitalet, Copenhagen University Hospital, Denmark
7. National Institute of Public Health, University of Southern Denmark, Denmark
8. Section for Nursing Department of Public Health, Aarhus University, Department of Cardiology, Aarhus University Hospital, Denmark