[1] Hosp Clin Barcelona, Liver Unit, Barcelona, Spain
[2] Hosp Clin Barcelona, Alcohol Unit, Psiquiatry Dept, Barcelona, Spain
[3] Univ N Carolina, Dept Med, Div Gastroenterol & Hepatol, Chapel Hill, NC USA
[4] Univ N Carolina, Dept Nutr, Div Gastroenterol & Hepatol, Chapel Hill, NC USA