1 Department of Hepatology and Gastroenterology, Liver Unit, Niguarda Hospital, Milan, Italy. Electronic address: claudio.zavaglia@ospedaleniguarda.it.
2 Department of Medicine and Surgery, University of Milan-Bicocca, Milan, Italy; International Center for Digestive Health, University of Milan-Bicocca, Milan, Italy.
3 Department of Hepatology and Gastroenterology, Liver Unit, Niguarda Hospital, Milan, Italy.
4 Department of Hepatology and Gastroenterology, Liver Unit, Niguarda Hospital, Milan, Italy; International Center for Digestive Health, University of Milan-Bicocca, Milan, Italy.