1. Department of Cardiology Laiko General Hospital Athens Greece
2. Cardiovascular Prevention & Research Unit, Clinic and Laboratory of Pathophysiology National and Kapodistrian University Athens School of Medicine Athens Greece
3. Department of Cardiology Onassis Cardiac Surgery Center Athens Greece
4. First Department of Cardiology Hippokration General Hospital National and Kapodistrian University Athens School of Medicine Athens Greece
5. First Department of Internal Medicine Laiko General Hospital National and Kapodistrian University Athens School of Medicine Athens Greece