1 Department of Medical Sciences, Liver Unit, University of Turin, Turin, Italy.
2 Division of Gastroenterology and Hepatology, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
3 Hepatology Unit and Laboratory of Molecular Genetics and Pathology of Hepatitis Viruses, Reference Center of the Tuscany Region for Chronic Liver Disease and Cancer, University Hospital of Pisa, Pisa, Italy.
4 Gastroenterology Unit, Città Della Salute e Della Scienza di Torino-Molinette Hospital, Turin, Italy.