title: Deaths among heroin users remain a mystery.
authors.forename: K
authors.initials: K
authors.lastname: Birchard
mesh_terms: D004196:Disease Outbreaks; D006556:Heroin Dependence / Q000453:epidemiology / Q000401:mortality*; D006801:Humans; D007273:Injections, Intramuscular; D006113:United Kingdom / Q000453:epidemiology