SLC39A4 and breast cancer: As shown in Figure 2, most of those genes showed positive relationships between high expression and significant worse OS in patients with BC, including SLC39A2 [HR = 1.29(1.04–1.6), P=0.019], SLC39A3 [HR = 1.51(1.1–2.07), P=0.0097], SLC39A4 [HR = 1.74(1.4–2.15), P=3E-07], SLC39A5 [HR = 1.62(1.17–2.25), P=0.0034], SLC39A7 [HR = 1.29(1.01–1.64), P=0.044], SLC39A12 [HR = 1.41(1-2), P=0.05] and SLC39A13 [HR = 1.72(1.25–2.36), P=0.00073].