ESR1 and breast carcinoma: Expectingly, Lum breast cancer showed a higher percentage of detected estrogen receptor (ER) and GATA3 positive cells (χ2 = 7.5; df=1; p=0.0062 and χ2 = 22.79; df=1; p=1.8e-06, respectively) (Figures 5D and 6D; Supplementary Table 9).