1. Faculty of Caring Science, Work Life and Social Welfare, University of Borås , Borås 501 90 , Sweden
2. Institute of Health and Care Sciences, University of Gothenburg , Gothenburg 405 30 , Sweden
3. Department of Health, Medicine and Caring Sciences, Linköping University , Linköping 581 83 , Sweden
4. Department of Cardiology, Odense University Hospital , Odense C 5000 , Denmark
5. Department of Clinical Research, University of Southern Denmark , Odense C 5000 , Denmark
6. Department of Cardiac, Thoracic and Vascular Surgery, Odense University Hospital , Odense C 5000 , Denmark