CDK1 and lung adenocarcinoma: Gene expression data of lung adenocarcinoma patients in the TCGA database were downloaded (https://portal.gdc.cancer.gov/, accessed on 17 March 2022), a total of 59 normal tissues and 539 lung adenocarcinoma tissues were included (the sample ID associated with the study in the TCGA database is provided in Supplementary Table S1), and the expression of CDK1 in normal tissues was statistically compared with that in lung adenocarcinoma tissues.