1. Liver Unit
2. Biochemistry Departament, Hospital Universitario Valle Hebron and CIBER-EHD of Instituto Carlos III, Passeig Vall d'Hebron 119-121, 08035 Barcelona, Spain
3. Directorate of Public Health, Generalitat of Catalonia
4. CIBER Epidemiology and Public Health (CIBERESP), Cr Roc Boronat 81-95, 08005 Barcelona, Spain
5. Department of Public Health, University of Barcelona, Cr Casanovas 143, 08036 Barcelona, Spain