Grace Lai-Hung Wong1, Pietro Lampertico2. 1. Institute of Digestive Disease, The Chinese University of Hong Kong, Hong Kong; Department of Medicine, The Chinese University of Hong Kong, Hong Kong. 2. CRC "A. M. and A. Migliavacca" Center for the Study of Liver Disease, Division of Gastroenterology and Hepatology, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Università degli Studi di Milano, Milan, Italy. Electronic address: pietro.lampertico@unimi.it.