Furthermore, after the third data preprocessing step, we remove105 out of 193 samples for the basal-like subtype, 119 out of 219 for luminal B, 67 out of 143 for the normal-like, 329 out of 581 for luminal A and 40 out of 82 for HER2+ subtypes of breast cancer as outlier data. Here, ERBB2 is linked to breast carcinoma.