title: The Drug Abuse Warning Network: a statistical perspective.
mesh_terms: D000437:Alcoholism / Q000453:epidemiology; D001463:Barbiturates; D004346:Drug Information Services; D004335:Drug and Narcotic Control; D006556:Heroin Dependence / Q000453:epidemiology; D006801:Humans; D007255:Information Services; D008691:Methadone; D019966:Substance-Related Disorders / Q000453:epidemiology*; D014149:Tranquilizing Agents; D014481:United States
chemical_list: D001463:Barbiturates; D014149:Tranquilizing Agents; D008691:Methadone