1. Department of Cardiac Surgery Onassis Cardiac Surgery Center Athens Greece
2. Laboratory of Experimental Surgery and Surgical Research “N.S. Christeas”, School of Medicine National and Kapodistrian University of Athens Athens Greece
3. Department of Cardiac Surgery, Democritus University of Thrace University Hospital of Alexandroupolis Alexandroupolis Greece
4. Cardiology Department, Democritus University of Thrace University Hospital of Alexandroupolis Alexandroupolis Greece
5. Fourth Department of Cardiac Surgery HYGEIA Hospital Athens Greece
6. Second Propaedeutic Department of Surgery, Laiko General Hospital, School of Medicine National and Kapodistrian University of Athens Athens Greece
7. First Department of Surgery, Laiko General Hospital, School of Medicine National and Kapodistrian University of Athens Athens Greece