CD8A and hepatocellular carcinoma: Finally, we utilized a “CIBERSORT” algorithm to obtain the proportions of 22 immune cell populations of each HCC patient, such as “T cells CD8,” “NK cells activated,” “monocytes,” “macrophages M0/1/2,” and “dendritic cells activated,” in the high- and low-risk groups of TCGA-LIHC cohort (Figure 8(a)).