To explore the roles of ERCC4 and MRP2 in the development of drug resistance in bladder cancer cells, we modulated their expression in T24 and UM-UC-3 cells (Fig. 2D, F and Fig. S2 E, G) and confirmed the effects of their knockdown at the translational level (Fig. 2E, G and Fig. S2 F, H). Here, ERCC4 is linked to urinary bladder cancer.