title: Patterns of heroin use.
mesh_terms: D000293:Adolescent; D000328:Adult; D004812:Epidemiologic Methods; D005260:Female; D006556:Heroin Dependence / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012107:Research Design; D012931:Social Environment; D009626:Terminology as Topic; D014481:United States