CYP2C9 and hepatocellular carcinoma: We searched the Kaplan-Meier OS curves and progression-free survival (PFS) curves of the four genes in the risk model in the GEPIA database and manifested that these four-gene levels had a dramatic impact on OS of patients (Figure 6(a)), among which the HCC patients with high expressions of CLEC1B, CYP2C9, and LCAT presented poor prognosis.