External genital human papillomavirus prevalence and associated factors among heterosexual men on 5 continents.

Vardas E, Giuliano AR, Goldstone S, Palefsky JM, Moreira ED, Penny ME, Aranda C, Jessen H, Moi H, Ferris DG, Liaw KL, Marshall JB, Vuocolo S, Barr E, Haupt RM, Garner EI, Guris D