ETV4 and hepatocellular carcinoma: WB and qRT–PCR analysis showed that ETV4 was overexpressed in HCC cell lines (HepG2, HepG2.2.15, SK-HEP-1, Hep3B, MHCC97H, and SMMC7721) compared with its expression in the control (L02) (Supplementary Fig. S3A).