TGFB2 and breast cancer: We implemented a multivariate Cox proportional hazards model to directly compare hazard ratio (HR) calculations for TGFB2 mRNA, an mRNA product of a marker gene (Gene2) expression, including an interaction term of TGFB2 by marker gene expression while controlling for age at diagnosis and breast cancer subtypes and comparing patients who received chemotherapy-only (chemo-only) therapies, and we filtered genes that reported HR greater than 1 for patients receiving only chemotherapy in the multivariate model.