CPVL and gastric cancer: In starBase (http://starbase.sysu.edu.cn/), we have obtained four potential upstream miRNAs (hsa-miR-196a-5p, hsa-miR-7-5p, hsa-miR-196b-5p, and hsa-miR-561-5p) correlated with CPVL (Table 2) and among them, we selected hsa-miR-196b-5p as a potential target because of its highest degree of negative correlation with CPVL. Moreover, we predicted the upstream lncRNAs of hsa-miR-196b-5p, and obtained 68 possible lncRNAs, and five lncRNAs showing a negative correlation with hsa-miR-196b-5p and positive correlation with CPVL in gastric cancer were filtered out (Table 3).