In the other five studies, positive stains in tumor cells and tumor-infiltrating mononuclear cells (TIMCs) were presented [16, 17, 44, 46, 47], and 4 studies counted both tumor cells and TIMCs as one of the positive staining [43, 44, 46, 47], and therefore, survival data from studies applying CPS and immune cells (ICs) score for positive PD-L1 expression were also pooled to investigate the prognostic roles. Here, CD274 is linked to neoplasm.