[1] Hosp Gen Univ Vall Hebron, Liver Unit, Barcelona, Spain
[2] Inst Salud Carlos III, CIBER Enfermedades Hepat & Digestivas CIBERHED, Barcelona, Spain
[3] Univ Barcelona, Dept Publ Hlth, Barcelona, Spain
[4] Inst Salud Carlos III, CIBER Epidemiol & Salud Publ CIBERESP, Barcelona, Spain
[5] Directorate Publ Hlth, Barcelona, Spain
[6] Hosp Gen Univ Vall Hebron, Dept Biochem, Barcelona, Spain
[7] Univ Barcelona, Dept Microbiol, Fac Biol, Barcelona, Spain