We found that 92.4% HR+ BC were determined to be either luminal A or B, 86.8% TNBC as basal-like and 40.6% HER2+ BC as HER2-like (Supplementary Figure 3), therefore we assessed the prognostic significance of the intrinsic subtype differences within IHC subtypes (Figure 2b). Here, ERBB2 is linked to breast cancer.