ERBB2 and breast cancer: Venn analysis revealed that largest commonality in DEGs was seen when comparing HR+ vs TNBC and HER2+HR+ vs TNBC, which is most likely due to a large similarity between HR+ and HER2+HR+ BC (Fig. 2B), which is in line with the observation that only a few genes were differentially expressed when comparing HR+ vs HER2+HR+ (Fig. 2A and Table S2).