title: Requirements and problems in urinalysis for abuse drugs: the role of gas chromatography.
mesh_terms: D000661:Amphetamine / Q000652:urine; D001463:Barbiturates / Q000652:urine; D002849:Chromatography, Gas / Q000295:instrumentation; D002855:Chromatography, Thin Layer; D006556:Heroin Dependence / Q000652:urine; D006801:Humans; D008722:Methods; D009020:Morphine / Q000652:urine; D009021:Morphine Dependence / Q000652:urine; D004364:Pharmaceutical Preparations / Q000652:urine*; D013053:Spectrophotometry; D019966:Substance-Related Disorders
chemical_list: D001463:Barbiturates; D004364:Pharmaceutical Preparations; D009020:Morphine; D000661:Amphetamine