1. Hepatogastroenterology Unit; Second Department of Internal Medicine-Propaedeutic; Research Institute and Diabetes Center; Athens Greece
2. 4th Department of Surgery; Medical School; National and Kapodistrian University of Athens; “Attikon” University General Hospital; Athens Greece
3. 2nd Department of Radiology; Medical School; National and Kapodistrian University of Athens; “Attikon” University General Hospital; Athens Greece