1. Center for Drug Use and HIV Research, New York University Rory Meyers College of Nursing, New York, New York.
2. Manhattan-Staten Island Area Health Education Center, Inc., New York, New York.
3. Harlem United, New York, New York.
4. New York City Department of Health and Mental Hygiene, New York, New York.
5. Division of Gastroenterology, Department of Medicine, Mount Sinai School of Medicine, New York, New York.
6. Aaron Diamond AIDS Research Center and The Rockefeller University, New York, New York.