title: Street drug analysis: an eleven year perspective on illicit drug alteration.
mesh_terms: D000293:Adolescent; D000661:Amphetamine; D003042:Cocaine; D003430:Cross-Sectional Studies; D006213:Hallucinogens; D006801:Humans; D006993:Hypnotics and Sedatives; D013287:Illicit Drugs; D002189:Marijuana Abuse / Q000453:epidemiology; D008694:Methamphetamine; D009293:Opioid-Related Disorders / Q000453:epidemiology; D019966:Substance-Related Disorders / Q000453:epidemiology*; D014481:United States
chemical_list: D006213:Hallucinogens; D006993:Hypnotics and Sedatives; D013287:Illicit Drugs; D008694:Methamphetamine; D000661:Amphetamine; D003042:Cocaine