CDK6 and cancer: In agreement with our results, all the studies showed that ZEB1‐circRNAs are upregulated in cancer; however, they identified different targets and functional axes (miR‐337‐3p/TGFBR1 [42], mR‐195‐5p/LOXL2 [43], miR‐448/EEF2K [44], miR‐200a‐3p/CDK6 [45] and miR‐199a‐3p/PIK3CA [46]).