PGF and hepatocellular carcinoma: However, we only discovered that the low expression of LI1RN was correlated with the worse OS; the high expression of nine genes was associated with worse OS in the HCC patients including BIRC5, CDK4, DCK, HSP90AA1, HSPA4, PGF, PSMD2, SPP1, and STC2 (Figure 4E,F).