title: The incidence of cocaine abuse among methadone maintenance patients.
mesh_terms: D000328:Adult; D000367:Age Factors; D003042:Cocaine / Q000652:urine; D003417:Criminal Psychology; D004651:Employment; D005191:Family Characteristics; D005260:Female; D006801:Humans; D008297:Male; D008691:Methadone / Q000627:therapeutic use*; D009294:Narcotics; D044469:Racial Groups; D012917:Social Adjustment; D019966:Substance-Related Disorders / Q000628:therapy / Q000652:urine; D013997:Time Factors
chemical_list: D009294:Narcotics; D003042:Cocaine; D008691:Methadone