CDKN2A and cervical squamous intraepithelial neoplasia: The RAP1 and p16INK4A expression levels in NDM, CIN 1, and CIN 2/3 lesions are shown in Fig 2, in S1 Fig and Table 1, which also include the HPV-16, HPV-18 and HPV-31 types that were detected in the CIN groups.