1. Department of Cardiology, Aarhus University Hospital , Palle Juul-Jensens Boulevard 99, 8200 Aarhus N , Denmark
2. Department of Cardiothoracic and Vascular Surgery, Odense University Hospital , J.B. Winsløwsvej 4, 5000 Odense C , Denmark
3. Department of Cardiology, Odense University Hospital , J.B. Winsløwsvej 4, 5000 Odense C , Denmark
4. University of Southern, Odense University Hospital , J.B. Winsløwsvej 4, 5000 Odense C , Denmark
5. Department of Cardiology, Herlev and Gentofte University Hospital , Gentofte , Denmark
6. Faculty of Health and Medical Sciences, University of Copenhagen , Nørregade 10, 1017 Copenhagen K , Denmark
7. Department of Cardiology, Aalborg University Hospital , Hobrovej 18-22, 9000 Aalborg , Denmark
8. Department of Cardiothoracic Surgery and Clinical Nursing Research Unit, Aalborg University Hospital , Hobrovej 18-22, 9000 Aalborg , Denmark
9. Centre for Cardiac, Vascular, Pulmonary and Infectious Diseases, Copenhagen University Hospital , Blegdamsvej 9, 2100 Copenhagen , Denmark
10. National Institute of Public Health, University of Southern Denmark , Studiestræde 6, 1455 Copenhagen , Denmark
11. Department of Social and Health Services, DEFACTUM, Central Denmark Region , Olof Palmes Allé 15, 8200 Aarhus N , Denmark