1. Department of Health Science, Blekinge Institute of Technology, Karlskrona, Sweden;
2. Department of Medical and Health Sciences, Linköping University, Linköping, Sweden;
3. Department of Cardio-Thoracic Surgery, Blekinge Hospital, Karlskrona, Sweden;
4. Department of Cardiology, Linköping University, Linköping, Sweden;
5. Department of Cardio-Thoracic and Vascular Surgery, Linköping University, Linköping, Sweden;
6. Department of Cardiovascular Anesthesia and Intensive Care, Linköping University, Linköping, Sweden