“…According to its potential to induce carcinogenesis, HPV types have been classified as low-risk oncogenicity (LR-HPV) and high-risk (Munoz et al, 2003). Previous studies showed that HR-HPV plays a crucial role in the etiology of anogenital cancer, especially cervical cancer (Cavalcanti et al, 1996). Many studies had showed that 13 HR-HPV subtypes were significant connected with cervical cancer, namely HPV16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, 59 and 68 (Clifford et al, 2003;Hwang et al, 2003).…”