Cut-off and toxicity levels for drugs-of-abuse testing.
D004305:Dose-Response Relationship, Drug; D006801:Humans; D013287:Illicit Drugs / Q000032:analysis / Q000652:urine; D012015:Reference Standards; D015813:Substance Abuse Detection / Q000592:standards*; D014481:United States
D013287:Illicit Drugs