Further, using the GEO dataset GSE30219 (Figure 1D) and KM-plotter (http://kmplot.com/analysis/index.php?p=service&cancer=lung) (Figure 1E), we drew K-M curves stratified by ERAP2 expression, exhibiting that patients with high ERAP2 expression had longer overall survival in SqCLC (p<0.05). Here, ERAP2 is linked to cancer.