[1] Univ Hosp Pisa, Hepatol Unit, Pisa, Italy
[2] Univ Hosp Pisa, Lab Mol Genet & Pathol Hepatitis Viruses, Reference Ctr Tuscany Reg Chron Liver Dis & Canc, Pisa, Italy
[3] Univ Padua, Dept Internal Med, Padua, Italy
[4] Univ Turin, Dept Med Sci, Citta Salute & Sci Hosp, Turin, Italy
[5] Univ Hosp Pisa, Digest & Liver Dis, Gen Med Unit 2, Pisa, Italy