Misuse of heroin and methadone in the city of Oxford.
D000293:Adolescent; D000328:Adult; D004739:England; D003932:Heroin; D006556:Heroin Dependence; D006801:Humans; D008691:Methadone; D008954:Models, Biological; D019966:Substance-Related Disorders / Q000453:epidemiology*
D003932:Heroin; D008691:Methadone