title: Letter: Interference in drug screening assays.
mesh_terms: D002849:Chromatography, Gas / Q000379:methods; D006801:Humans; D008012:Lidocaine; D004364:Pharmaceutical Preparations / Q000032:analysis*; D011041:Poisoning / Q000652:urine*
chemical_list: D004364:Pharmaceutical Preparations; D008012:Lidocaine