title: [Services for drug users. Making a difference in many lives].
authors.forename: Jos-María
authors.initials: JM
authors.lastname: Medellín
mesh_terms: D015658:HIV Infections / Q000517:prevention & control* / Q000635:transmission; D040261:Harm Reduction; D006801:Humans; D018671:Needle-Exchange Programs / Q000458:organization & administration*; D009519:New York City; D015397:Program Evaluation; D015819:Substance Abuse, Intravenous / Q000523:psychology / Q000534:rehabilitation*