title: Are needle-exchange programs really helpful?
authors.affiliation: Cambridge Hospital, MA, USA.
authors.forename: M
authors.initials: M
authors.lastname: Gorman
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000150:complications; D000328:Adult; D003932:Heroin; D006801:Humans; D008297:Male; D008404:Massachusetts; D018671:Needle-Exchange Programs; D009732:Nursing Care / Q000379:methods; D011020:Pneumonia, Pneumocystis / Q000150:complications; D015819:Substance Abuse, Intravenous / Q000451:nursing*
chemical_list: D003932:Heroin