A thin-layer chromatographic screening test for the detection of users of morphine or heroin.
D002855:Chromatography, Thin Layer; D003932:Heroin; D006801:Humans; D009020:Morphine; D009021:Morphine Dependence / Q000175:diagnosis*; D014556:Urine
D003932:Heroin; D009020:Morphine