Letter: Drug screening for employment purposes: the importance of telling it like it is.
D002855:Chromatography, Thin Layer; D003042:Cocaine / Q000652:urine; D005069:Evaluation Studies as Topic; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D009020:Morphine / Q000652:urine*; D009787:Occupational Medicine; D011803:Quinine / Q000652:urine*
D009020:Morphine; D011803:Quinine; D003042:Cocaine