title: US cities struggle to implement needle exchanges despite apparent success in European cities.
authors.forename: C A
authors.initials: CA
authors.lastname: Raymond
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000517:prevention & control; D005060:Europe; D006801:Humans; D009339:Needles / Q000600:supply & distribution*; D019966:Substance-Related Disorders; D014481:United States; D014504:Urban Health