"Free" needles for intravenous drug users at risk for AIDS: current developments in New York City.
D000163:Acquired Immunodeficiency Syndrome / Q000517:prevention & control*; D006801:Humans; D007275:Injections, Intravenous / Q000295:instrumentation; D009339:Needles; D009519:New York City; D019966:Substance-Related Disorders