SLC31A1 and lung cancer: High CTR1 expression was significantly correlated with a favorable OS in the subgroups of “ovarian cancer” (HR = 0.71, 95% CI: 0.57-0.90, P = 0.004), lung cancer” (HR = 0.31, 95% CI: 0.17-0.58, P = 0.000), “platinum-based” (HR = 0.63, 95% CI: 0.49-0.81, P = 0.000), “America” (HR = 0.68, 95% CI: 0.82-0.88, P = 0.003), “Asia” (HR = 0.34, 95% CI: 0.16-0.73, P = 0.006), “dataset” (HR = 0.86, 95% CI: 0.53-0.87, P = 0.002), “literature” (HR = 0.34, 95% CI: 0.16-0.73, P = 0.006), “gene array” (HR = 0.86, 95% CI: 0.53-0.87, P = 0.002) and “IHC” (HR = 0.34, 95% CI: 0.16-0.73, P = 0.006).