[1] Addict Res & Treatment Corp, Brooklyn, NY 11201 USA
[2] VA New York Harbor Healthcare Syst, Div Gastroenterol, New York, NY USA
[3] Cornell Univ, Weill Med Coll, Dept Publ Hlth, New York, NY 10021 USA
[4] Nathan S Kline Inst Psychiat Res, Orangeburg, NY USA
[5] Univ Washington, Dept Psychiat & Behav Sci, Alcohol & Drug Abuse Inst, Seattle, WA 98195 USA
[6] New York State Psychiat Inst & Hosp, New York, NY 10032 USA
[7] VA New York Harbor Healthcare Syst, Dept Psychiat, New York, NY USA
[8] NYU, Sch Med, New York, NY USA
[9] Connecticut Renaissance Inc, Norwalk, CT USA
[10] New York State Dept Hlth, AIDS Inst, Albany, NY 12237 USA