The role of the laboratory in patient management.
D000293:Adolescent; D002849:Chromatography, Gas; D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer; D006801:Humans; D013287:Illicit Drugs / Q000032:analysis*; D007124:Immunoenzyme Techniques; D011863:Radioimmunoassay; D019966:Substance-Related Disorders / Q000175:diagnosis* / Q000652:urine
D013287:Illicit Drugs