1. Heart and Lung Center Helsinki University Hospital Helsinki Finland
2. Heart Center Turku University Hospital, and University of Turku Turku Finland
3. Research Unit of Surgery, Anesthesiology and Critical Care University of Oulu Oulu Finland
4. Heart Center Kuopio University Hospital Kuopio Finland
5. Heart Hospital, Tampere University Hospital and Faculty of Medicine and Health Technology Tampere University Tampere Finland
6. Department of Internal Medicine Oulu University Hospital Oulu Finland