1 Department of Anesthesiology and Intensive Care, Linköping University Hospital, Linköping, Sweden. Electronic address: hampus.edgren@regionostergotland.se.
2 Department of Cardiothoracic and Vascular Surgery, Linköping University Hospital, Linköping, Sweden; Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden.
3 Department of Cardiothoracic and Vascular Surgery, Linköping University Hospital, Linköping, Sweden.
4 Department of Surgery, Linköping University Hospital, Linköping, Sweden; Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden.
5 Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; Department of Anaesthesiology and Intensive Care Medicine, Sahlgrenska University Hospital, Gothenburg, Sweden.