MKLN1 and hepatocellular carcinoma: Specifically, the six prognostic lncRNAs, including LINC01134, RHPN1-AS1, NRAV, CMB9-22P13.1, MKLN1-AS, and MAPKAPK5-AS1, were confirmed to be upregulated in most of HCC samples (Figure 3, Supplementary S2 ), suggesting that the upregulation of the six prognostic lncRNAs could also be observed in our tissue samples.