POU5F1 and gastric cancer: Online dataset showed that SLC7A11 expression is negatively correlated with the survival probability of GC patients (http://kmplot.com) (Fig. 5B) and positively correlated with stemness marker (ALDH1A1, Oct4) expression (R2: Genomics Analysis and Visualization Platform (http://r2.amc.nl)) (Fig. 5C, D).