1. Heart Center Turku University Hospital and University of Turku Turku Finland
2. Heart and Lung Center Helsinki University Hospital Helsinki Finland
3. Research Unit of Surgery, Anesthesia and Critical Care University of Oulu Oulu Finland
4. Department of Acute Internal Medicine Turku University Hospital and University of Turku Turku Finland
5. Cardiovascular Medicine, Brigham and Women's Hospital Harvard Medical School Boston MA USA