title: [Comments on the article: Evolution of the need and coverage of opioid substitution and needle exchange programs in Spanish, 1992-2009].
authors.forename: José Manuel
authors.initials: JM
authors.lastname: Arroyo Cobo
mesh_terms: D015658:HIV Infections / Q000517:prevention & control*; D006526:Hepatitis C / Q000517:prevention & control*; D006801:Humans; D018671:Needle-Exchange Programs / Q000639:trends*; D058850:Opiate Substitution Treatment / Q000639:trends*; D009293:Opioid-Related Disorders / Q000188:drug therapy*; D011329:Prisoners / Q000706:statistics & numerical data*; D011330:Prisons / Q000458:organization & administration*