title: Gas chromatographic detection of methadone and morphine in the urine of drug addicts.
mesh_terms: D002849:Chromatography, Gas; D002855:Chromatography, Thin Layer; D006801:Humans; D008691:Methadone / Q000652:urine*; D009020:Morphine / Q000652:urine*; D019966:Substance-Related Disorders / Q000175:diagnosis*
chemical_list: D009020:Morphine; D008691:Methadone