title: Heroin epidemics.
mesh_terms: D002641:Chicago; D003415:Crime; D003932:Heroin; D006556:Heroin Dependence / Q000453:epidemiology; D006798:Housing; D006801:Humans; D008913:Minority Groups; D011203:Poverty; D012940:Social Problems; D012959:Socioeconomic Factors; D019966:Substance-Related Disorders / Q000453:epidemiology*; D014505:Urban Population
chemical_list: D003932:Heroin