title: Covert drug abuse among voluntary hospitalized psychiatric patients.
mesh_terms: D000293:Adolescent; D000328:Adult; D000661:Amphetamine / Q000652:urine; D001463:Barbiturates / Q000652:urine; D001519:Behavior / Q000187:drug effects; D002845:Chromatography; D006760:Hospitalization; D006778:Hospitals, Psychiatric; D006801:Humans; D001523:Mental Disorders / Q000628:therapy; D009294:Narcotics / Q000652:urine; D019966:Substance-Related Disorders
chemical_list: D001463:Barbiturates; D009294:Narcotics; D000661:Amphetamine