Data from public data portals such as cBioPortal (https://www.cbioportal.org/) (30–32) and DepMap Portal (https://depmap.org/portal) (33) show the relation of mRNA gene expression between the EMT phase markers E-cadherin, Vimentin, β-catenin, Elastin, Periostin, and Versican to DPP4 in lung adenocarcinoma (Supplementary Figures 1A–F, 2A–F). Here, CDH1 is linked to lung adenocarcinoma.