CDKL2 and gastric cancer: The result showed that GC patients with higher CDKL2 mRNA level had significantly shorter OS than those with lower CDKL2 mRNA level (26.5 vs. 46.9 months, HR = 1.39 (1.01–1.92), p = 0.043, the median was set as a cut-off point, Figure 4(d)), which was consistent with the protein expression and gene copy number results in our analysis.