F5 and hepatocellular carcinoma: Interestingly, ATP7A, ATP13A2, and SNCA, which were all unfavorable for the OS of patients (Figure 1), were found to be positively correlated with multiple types of immune cell infiltration in HCC, whereas COX17, F5, and ALB, which were all favorable for the OS of patients, were negatively correlated with immune cell infiltration in HCC.