1. a Division of Gastroenterology , VA New York Harbor Healthcare System and New York University School of Medicine , New York, NY
2. b Addiction Research and Treatment Corporation , Brooklyn, NY
3. c Department of Public Health , Weill Medical College, Cornell University , New York, NY
4. d Nathan Kline Institute , Orangeburg, NY
5. e New York State Psychiatric Institute , New York, NY
6. f Department of Psychiatry , VA New York Harbor Healthcare System and New York University School of Medicine , New York, NY