[1] Pisa Univ Hosp, Hepatol Unit, Pisa, Italy
[2] Univ Pisa, Dept Clin & Expt Med, Pisa, Italy
[3] Univ Buenos Aires, Sch Pharm & Biochem, Dept Microbiol Immunol & Biotechnol, Buenos Aires, DF, Argentina
[4] Natl Sci & Tech Res Council CONICET, Buenos Aires, DF, Argentina
[5] Natl Res Council Italy, Biostruct & Bioimaging Inst, Milan, Italy