title: Heroin, hassle, and treatment: the importance of perceptual differences.
mesh_terms: D001290:Attitude; D003415:Crime; D004361:Drug Tolerance; D006556:Heroin Dependence / Q000534:rehabilitation*; D006801:Humans; D008019:Life Style; D009042:Motivation; D012926:Social Control, Formal; D012927:Social Control, Informal; D013997:Time Factors; D014481:United States