title: Canada: federal prison system expands access to methadone.
mesh_terms: D002170:Canada / Q000453:epidemiology; D006297:Health Services Accessibility; D006556:Heroin Dependence / Q000188:drug therapy; D006801:Humans; D008691:Methadone / Q000600:supply & distribution* / Q000627:therapeutic use; D011330:Prisons
chemical_list: D008691:Methadone