title: The epidemiology of drug abuse: current issues. Indicators of drug abuse--buys.
mesh_terms: D002140:California; D003365:Costs and Cost Analysis; D004196:Disease Outbreaks; D004812:Epidemiologic Methods; D003932:Heroin / Q000032:analysis; D006556:Heroin Dependence / Q000453:epidemiology; D006801:Humans; D019966:Substance-Related Disorders / Q000453:epidemiology*
chemical_list: D003932:Heroin