Through data mining we found that even though triple-negative and luminal breast tumors and cell lines harbor a wide range of ESE-1 mRNA expression, starting from very low or negative log values to very high, and with only HER2+ breast tumors and cell lines segregating with very high mRNA expression of ESE-1 (Supplementary Figures 1–3). The gene discussed is ERBB2; the disease is breast neoplasm.