P4HA2 and hepatocellular carcinoma: We also identified 4 CpGs within P4HA2 associated with poor prognosis of HCC: 5′ UTR-N_Shelf-cg09830083, TSS200; TSS1500-Island-cg11586658, TSS200; TSS1500-Island-cg18640183; and 3′ UTR-Open_Sea-cg26256836 (Fig. 6C-F).