Interestingly, we examined the METABRIC and KM-Plotter datasets and found that higher expression of GSTM1 in breast tumors is associated with better survival of patients with ER+ tumors (Fig. 4c, d, logrank p value for METABRIC = 8.2E-4, logrank p value for KM-Plotter = 5.9E-3). The gene discussed is GSTM1; the disease is breast neoplasm.