Human papillomavirus (HPV) is a widely prevalent sexually transmitted virus. Although the majority of infections are benign and transient, persistent infection is associated with the development of cervical, vulvar, vaginal and anal cancers (1) .The genital HPV types are divided into two categories, 'high risk' and 'low risk', originally assigned based on whether the HPV type could or could not be found as a solitary isolate in cervical cancer specimens (2) . It is now universally accepted that nearly all the invasive cervical cancers and high grade intraepithelial neoplasia and
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