Public data cBioPortal (https://www.cbioportal.org/) and DepMap Portal (https://depmap.org/portal) reveal a correlation of the mRNA gene expression of the EMT phase markers E-cadherin, Vimentin, β-catenin, Elastin, Periostin, and Versican with DPP4 in lung adenocarcinoma (Supplementary Figures 1A–F, Supplementary Figures 2A–F), thus corroborating our immunohistochemical data. This evidence concerns the gene CDH1 and lung adenocarcinoma.