[1] Univ Valencia, Dept Med, Hepatol & Liver Transplantat Unit, La Fe Hosp, E-46003 Valencia, Spain
[2] Inst Salud Carlos III, Natl Network Ctr Hepatol & Gastroenterol Res, CIBEREHD, Madrid, Spain
[3] Johannes Gutenberg Univ Mainz, Univ Med Ctr, Dept Med 1, D-55116 Mainz, Germany
[4] Harvard Univ, Sch Med, Beth Israel Deaconess Med Ctr, Div Gastroenterol, Boston, MA 02215 USA