title: Cut-off and toxicity levels for drugs-of-abuse testing.
mesh_terms: D001463:Barbiturates / Q000633:toxicity; D019411:Clinical Laboratory Techniques / Q000592:standards*; D006213:Hallucinogens / Q000633:toxicity; D006801:Humans; D009294:Narcotics / Q000633:toxicity; D012016:Reference Values; D019966:Substance-Related Disorders / Q000097:blood* / Q000652:urine*; D014481:United States
chemical_list: D001463:Barbiturates; D006213:Hallucinogens; D009294:Narcotics