[1] Univ Navarra, Fac Med, Edificio Castanos, Dept Med Interna,Unidad Hepatol & Terapia Gen, Pamplona 31008, Spain
[2] Univ Valencia, Dept Bioquim & Biol Mol, E-46100 Valencia, Spain
[3] Hosp Clin & Prov, Serv Hepatol, Barcelona 08036, Spain
[4] Univ So Calif, Sch Med, Dept Med, Ctr Liver Dis Res, Los Angeles, CA 90033 USA
[5] Univ So Calif, Sch Med, Dept Med, Div Gastrointestinal Liver Dis, Los Angeles, CA 90033 USA