1. Department of Gastroenterology, Medical School of National and Kapodistrian University of Athens, General Hospital of Athens “Laiko”, Athens, Greece
2. Division of Gastroenterology and Hepatology, Foundation IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milan, Italy
3. Department of Pathophysiology and Transplantation, CRC “A.M. and A. Migliavacca” Center for Liver Disease, University of Milan, Milan, Italy