1. Department of Cardiothoracic Surgery, Department of Clinical Sciences, Lund University, Lund, Sweden.
2. Department of Anesthesiology and Intensive Care, Department of Clinical Sciences, Lund University, Lund, Sweden.
3. Department of Psychiatry, Landspitali University Hospital, Faculty of Medicine, University of Iceland, Reykjavik, Iceland.
4. Department of Infectious Diseases, Landspitali University Hospital, Faculty of Medicine, University of Iceland, Reykjavik, Iceland.
5. Department of Surgery, Department of Clinical Sciences, Lund University, Malmö, Sweden.
6. Department of Radiology, Akureyri Hospital, Akureyri, Iceland.
7. Department of Cardiothoracic Surgery, Landspitali University Hospital, Faculty of Medicine, University of Iceland, Reykjavik, Iceland.