title: Thin layer chromatography as a method of screening for narcotics usage.
mesh_terms: D001463:Barbiturates / Q000652:urine; D002188:Cannabis / Q000652:urine; D002855:Chromatography, Thin Layer / Q000295:instrumentation; D006801:Humans; D008722:Methods; D009020:Morphine / Q000652:urine; D009294:Narcotics / Q000652:urine*; D019966:Substance-Related Disorders / Q000652:urine*; D014149:Tranquilizing Agents / Q000652:urine
chemical_list: D001463:Barbiturates; D009294:Narcotics; D014149:Tranquilizing Agents; D009020:Morphine