IER5 and brain cancer: The correlation between IER5 and HSPA6 expression is also quite strong (Fig. 7G and S5, r = 0.47 and p < 0.0001 in bladder cancer samples, r = 0.63 and p < 0.0001 in breast cancer samples and r = 0.2896 and p < 0.005 in brain cancer samples).