1. First Faculty of Medicine, Charles University, Prague, Czech Republic
2. 2nd Department of Cardiovascular Surgery, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
3. Faculty of Medicine, Jagiellonian University Medical College, Kraków, Poland
4. Division of Cardiovascular Surgery, Kaohsiung Medical University School of Medicine, Chung-Ho Memorial Hospital, Kaohsiung
5. Institute of Pathological Physiology and the 3rd Department of Internal Medicine, First Faculty of Medicine, Charles University in Prague, and General University Hospital in Prague, Prague, Czech Republic
6. Department of Thoracic and Cardiovascular Surgery, Research Institute, Cleveland Clinic, Cleveland, OH, USA