title: Deaths from methadone and heroin.
authors.forename: J
authors.initials: J
authors.lastname: Marks
mesh_terms: D003932:Heroin; D006801:Humans; D008691:Methadone; D019966:Substance-Related Disorders / Q000453:epidemiology / Q000401:mortality*; D006113:United Kingdom
chemical_list: D003932:Heroin; D008691:Methadone