title: [In regard to the paper: Developments in the necessity and coverage of the syringe exchange program in Spanish prisons, 1992-2009. Estimation after correction].
authors.forename: Enrique J
authors.initials: EJ
authors.lastname: Acín García
mesh_terms: D006297:Health Services Accessibility / Q000706:statistics & numerical data*; D006301:Health Services Needs and Demand; D006801:Humans; D018671:Needle-Exchange Programs / Q000600:supply & distribution*; D011330:Prisons / Q000458:organization & administration*