1. Department of Cardiology General Hospital of Athens “Laiko” Athens Greece
2. First Department of Internal Medicine, Medical School of National and Kapodistrian University of Athens General Hospital of Athens “Laiko” Athens Greece
3. Department of Gastroenterology, Medical School of National and Kapodistrian University of Athens General Hospital of Athens “Laiko” Athens Greece
4. 2nd Department of Radiology, Medical School National and Kapodistrian University of Athens Athens Greece
5. First Department of Cardiology General Hospital of Athens “Hippokration”, National and Kapodistrian University Athens School of Medicine Athens Greece