1. Faculty of Medicine and Health, School of Health Sciences, Örebro University, Örebro, Sweden
2. Department of Cardiothoracic and Vascular Surgery, Örebro University Hospital, Örebro, Sweden
3. Faculty of Medicine and Health, University Health Care Research Centre, Örebro University, Örebro, Sweden
4. Department of Health, Medical and Caring Sciences, Linköping University, Linköping, Sweden
5. Department of Cardiothoracic Surgery and Department of Health, Medical and Caring Sciences, Linköping University, Linköping, Sweden