1. Division of Gastroenterology and Center for Autoimmune Liver Diseases, Department of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
2. European Reference Network on Hepatological Diseases (Ern Rare-liver), San Gerardo Hospital, Monza, Italy
3. Division of Rheumatology and Clinical Immunology, University of California at Davis School of Medicine, Davis, California, USA