CD4 and cervical squamous intraepithelial neoplasia: The percentage of CD4+CD25+Tregs was markedly higher in the peripheral total CD4 cells of patients with CC (median=7.12%, range, 3.25-13.16%, P<0.001) and CIN (median=5.97%, range, 3.11-9.16%, P<0.001) than in those of healthy controls (median=4.49%, range, 1.66-7.34%).