To further verify CDH6 expression, we measured the expression level of CDH6 in 20 donor-matched GC tissues by qRT-PCR (P < 0.05, Fig. 1f) and in the normal gastric epithelial cell line GES-1, and three GC cell lines (HGC-27, MGC-803, and NCI-N87) (P < 0.05, Fig. 2). The gene discussed is CDH6; the disease is gastric cancer.