Greater expression of the human leukocyte antigen-g (HLA-g) and interleukin-17 (IL-17) in cervical intraepithelial neoplasia: Analytical cross-sectional study,Aumento da expressao do antigeno leucocitario humano-g (HLA-g) e interleucina-17 (IL-17) em neoplasia intraepitelial cervical: estudo transversal analitico