METTL3 and hepatocellular carcinoma: Upregulated mRNA expression of METTL3 was associated with poor OS (p = 0.003), RFS (p = 0.0014), PFS (p = 0.0072) and DSS (p = 0.0068), suggesting that patients with HCC with upregulated METTL3 expression had a poor prognosis.