The "British system" of heroin maintenance.
D003415:Crime; D003932:Heroin / Q000627:therapeutic use; D006556:Heroin Dependence / Q000188:drug therapy; D006801:Humans; D008691:Methadone / Q000627:therapeutic use; D008722:Methods; D019966:Substance-Related Disorders / Q000188:drug therapy* / Q000517:prevention & control; D006113:United Kingdom; D014481:United States
D003932:Heroin; D008691:Methadone