title: The epidemiology of heroin and other narcotics: selected themes of the discussion.
mesh_terms: D004812:Epidemiologic Methods; D006040:Goals; D006306:Health Surveys; D006556:Heroin Dependence / Q000453:epidemiology* / Q000534:rehabilitation; D006801:Humans; D008962:Models, Theoretical; D011640:Public Policy; D012107:Research Design; D019966:Substance-Related Disorders / Q000453:epidemiology* / Q000534:rehabilitation