title: Measuring effectiveness of needle and syringe exchange programs for prevention of HIV among injecting drug users: Response to Amundsen.
authors.forename: Lisa
authors.initials: L
authors.lastname: Maher
authors.forename: Jenny
authors.initials: J
authors.lastname: Iversen
authors.forename: John
authors.initials: J
authors.lastname: Kaldor
mesh_terms: D003376:Counseling; D015658:HIV Infections / Q000517:prevention & control*; D040261:Harm Reduction; D006801:Humans; D018671:Needle-Exchange Programs; D011634:Public Health; D015819:Substance Abuse, Intravenous