title: Injecting equipment exchange schemes in England and Scotland.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000517:prevention & control*; D003153:Community Health Services; D004739:England; D006291:Health Policy / Q000639:trends; D006801:Humans; D009339:Needles; D012606:Scotland; D019966:Substance-Related Disorders / Q000150:complications*; D013594:Syringes