| http://www.w3.org/ns/prov#value | - Men who have sex with men (MSM) are particularly at risk for conditions associated with HPV types 6, 11, 16, and 18; diseases and cancers that have a higher incidence among MSM include anal intraepithelial neoplasias, anal cancers, and genital warts.8,9 HPV4 has high efficacy for prevention of anal intraepithelial neoplasias in MSM10; however, this information was not available before the October
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