Venn diagram showing overlap between genes that were significantly (P < 0.05) induced more than 1.5-fold in response to paclitaxel treatment of MDA231-LM2 cells and genes that were significantly (P < 0.05) induced in MDA231-LM2 cells after formation of oncospheres. Significant fold changes were determined by two-sample empirical Bayer tests with Benjamini-Hochberg correction for multiple testing. PAX. 