While no differences have been observed between the sensitivity of ERα-positive and ERα-negative BC cell lines to Resi, K-Stro, Digi, and Digoxig, significantly higher sensitivities in ERα-positive BC cell lines than in ERα-negative BC cell lines (Figure 1B and Supplementary Table S1) have been scored for Lana, Peru, Digo, and OU. The gene discussed is ESR1; the disease is breast cancer.