RTN4 and hepatocellular carcinoma: Accumulating evidence suggests that miR‐338‐5p can function as a target of circRNAs.[41, 42, 43] Shen et al.[41] reported that hsa_circ_00 32683 could sponge miR‐338‐5p and reduce the inhibition of its target RTN4, thus suppressing the progression of hepatocellular carcinoma.