[1] Weill Cornell Med Coll, Ctr Study Hepatitis C, New York, NY 10065 USA
[2] Weill Cornell Med Coll, Div Gastroenterol & Hepatol, New York, NY 10065 USA
[3] Beth Israel Deaconess Med Ctr, Dept Med, New York, NY 10003 USA
[4] Beth Israel Deaconess Med Ctr, Baron de Rothschild Chem Dependency Res Inst, New York, NY 10003 USA
[5] Ctr Drug Use & HIV Res, New York, NY USA