1. Department of Cardiothoracic Surgery, School of Health Sciences University of Thessaly Larisa Greece
2. Department of Internal Medicine University of Cincinnati Medical Center Cincinnati Ohio USA
3. Department of Surgery Johns Hopkins University School of Medicine Baltimore Maryland USA
4. Division of Cardiovascular Medicine, Brigham and Women's Hospital Harvard Medical School Boston Massachusetts USA
5. Department of Cardiothoracic Surgery Research Lankenau Institute for Medical Research Wynnewood Pennsylvania USA
6. Department of Medicine, Division of Cardiology New York University Langone Medical Center New York New York USA
7. Department of Cardiac Surgery Cardiocentro Ticino Lugano Switzerland