KRT13 and lung adenocarcinoma: Although there were no direct comparative reports of KRT13 expression in comparison between OSCC-LM and LSCC, expression of KRT13 in LSCC showed a very high signal value than that in normal lung and lung adenocarcinoma (LAdC) from the GEO profiles database (NCBI GEO database, https://www.ncbi.nlm.nih.gov/geo/tools/profileGraph.cgi?ID=GDS1312:207935_s_at, 2022–12-26, NCBI GEO database, https://www.ncbi.nlm.nih.gov/geo/tools/profileGraph.cgi?ID=GDS3627:207935_s_at, 2022–12-26).