1. Hepatology Unit and Laboratory of Molecular Genetics and Pathology of Hepatitis Viruses, Reference Centre of the Tuscany Region for Chronic Liver Disease and Cancer; University Hospital of Pisa; Pisa Italy
2. Paediatric Gastroenterology Unit; Regina Margherita Children Hospital; Torino Italy
3. University of Padova; Padova Italy
4. University of Pittsburgh Medical Center Institute for Health; Chianciano Terme Siena Italy
5. Fondazione Italiana Fegato; AREA Science Park, Campus Basovizza; Trieste Italy
6. Internal Medicine, Department of Clinical and Experimental Medicine; University of Pisa; Pisa Italy