title: Letter: Evaluation of five commercial pregnancy test kits using urine samples containing methadone.
mesh_terms: D002855:Chromatography, Thin Layer; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D008297:Male; D008691:Methadone / Q000652:urine*; D011247:Pregnancy; D011259:Pregnancy Tests, Immunologic / Q000592:standards*
chemical_list: D008691:Methadone