I. To systematically evaluate programmed cell death (PD)-1 and B7 homolog 1 (B7-H1) (i.e., PD-1 ligand) expression in tumor infiltrating lymphocytes (TILs) and cervical cancer cells and explore their correlations with objective response, PFS, and OS in nivolumab-treated patients with PD-1 and B7-H1 scoring results.