title: Estimates of user populations for heroin and other narcotics. Available methodologies and their limitations: survey data as contributors to estimation.
mesh_terms: D000293:Adolescent; D000328:Adult; D006306:Health Surveys / Q000379:methods; D006556:Heroin Dependence / Q000453:epidemiology*; D006801:Humans; D019966:Substance-Related Disorders / Q000453:epidemiology*; D014481:United States