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Prevalence of infection with carcinogenic human papillomavirus among older women
John W. Sellors, Tina L. Karwalajtys, Janusz A. Kaczorowski, James B. Mahony, Alice Lytwyn, Sylvia Chong, Joanna Sparrow, Attila Lorincz and The Survey of HPV in Older Ontario Women (SHOOW) Group