1. Division of Gastroenterology and Center for Autoimmune Liver Diseases, European Reference Network on Hepatological Diseases (ERN RARE-LIVER), San Gerardo Hospital , Monza , Italy
2. Department of Medicine and Surgery, University of Milano-Bicocca , Monza , Italy
3. Gastroenterology and Endoscopy, IRCCS Ospedale San Raffaele , Milan , Italy
4. Vita-Salute San Raffaele University , Milan , Italy