1. Liver Unit; Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), CIBER de Enfermedades Hepáticas y Digestivas (CIBERehd); Barcelona Catalonia Spain
2. Laboratory of Liver Diseases; National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health; Bethesda MD
3. Alcoholism Unit, Department of Internal Medicine; IBSAL-University Hospital of Salamanca; Salamanca Spain
4. Genotyping and Genetic Diagnosis Unit; Research Foundation of Hospital Clínico; Valencia Spain
5. Service d'Hépato-Gastroentérologie; Amiens University Hospital and Groupe de Recherche sur l'Alcool et les Pharmacodépendances (INSERM ERI 24, GRAP), Picardie University; Amiens France
6. Division of Gastroenterology and Hepatology; Departments of Medicine and Nutrition; University of North Carolina at Chapel Hill; Chapel Hill NC