title: Chasing the dragon and syringe-exchange schemes.
authors.forename: S
authors.initials: S
authors.lastname: Madden
mesh_terms: D000280:Administration, Inhalation; D003932:Heroin / Q000008:administration & dosage*; D006556:Heroin Dependence / Q000209:etiology*; D006801:Humans; D007275:Injections, Intravenous; D006113:United Kingdom
chemical_list: D003932:Heroin