ATF3 and hepatocellular carcinoma: Besides, the costaining of circSTX6 and ATF3 in HCC cohort‐2 revealed that approximately 85.2% of the circSTX6 highly expressed tumour tissues weakly expressed ATF3, whereas 76.9% of circSTX6 weakly expressed tumour tissues showed stronger ATF3 staining (Figure 7G,H).