We note that the ESR1 probe is in the nanoString cancer mRNA panel and very low expression of this mRNA was detected in 7 TNBCs, as shown in Fig. 3, molecular subgroup 2 (blue); the ESR1 protein was not expressed in these tumors, as determined by immunohistochemical analyses, a basis upon which the tumors were selected for this study. The gene discussed is ESR1; the disease is cancer.