title: Self-regulation of dose in methadone maintenance with contingent privileges.
mesh_terms: D000328:Adult; D000661:Amphetamine; D001463:Barbiturates; D004334:Drug Administration Schedule; D005260:Female; D006556:Heroin Dependence / Q000534:rehabilitation*; D006801:Humans; D008297:Male; D008691:Methadone / Q000008:administration & dosage* / Q000627:therapeutic use; D009294:Narcotics / Q000652:urine; D012646:Self Administration; D019966:Substance-Related Disorders / Q000150:complications; D013997:Time Factors
chemical_list: D001463:Barbiturates; D009294:Narcotics; D000661:Amphetamine; D008691:Methadone