KIF4A and breast cancer: While each of these miRNAs can be targeted by two or more circRNAs in BC and CRC, miR-338-3p is targeted by circ_TFF1, circ_0001313, and circ_0055625; miR-375 by circ_KIF4A and circ_PPP1R12A; and miR-149-5p by circ_0072995 and circ_0005615.