title: Heroin: a worsening problem and a challenge for testing.
authors.forename: Tiffany N
authors.initials: TN
authors.lastname: Heady
authors.forename: Dede
authors.initials: D
authors.lastname: Haverstick
mesh_terms: D062787:Drug Overdose / Q000401:mortality; D053593:Forensic Toxicology; D006556:Heroin Dependence / Q000175:diagnosis* / Q000453:epidemiology*; D006801:Humans; D015813:Substance Abuse Detection / Q000379:methods*; D014481:United States / Q000453:epidemiology