title: Methadone replacement therapy: facilitating immediate access.
mesh_terms: D000701:Analgesics, Opioid / Q000627:therapeutic use*; D003376:Counseling; D006297:Health Services Accessibility; D006556:Heroin Dependence / Q000188:drug therapy*; D006801:Humans; D008691:Methadone / Q000627:therapeutic use*; D016032:Randomized Controlled Trials as Topic; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D000701:Analgesics, Opioid; D008691:Methadone