title: Trends in narcotic use in Toronto and treatment response.
mesh_terms: D006556:Heroin Dependence / Q000453:epidemiology; D006801:Humans; D008691:Methadone / Q000627:therapeutic use*; D009864:Ontario; D019966:Substance-Related Disorders / Q000188:drug therapy / Q000453:epidemiology*
chemical_list: D008691:Methadone