The 2006 edition of the Canadian Guidelines on Sexually Transmitted Infections (STIs) is available online (at [www.phac-aspc.gc.ca/std-mts/sti\_2006/sti\_intro2006_e.html][1]) and in hard copy from the Canadian Public Health Association. For this edition, revision and chapter review followed an even
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MacDonald et al. (2007) studied this question.
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