Table 1. The detailed information of included datasets.

ID	Series	Platform	Tumor	Control	Publication
1	TCGA-LUAD	TCGA	453	49	TCGA
2	GSE68465	GPL96	443	19	Shedden et al. (15)
3	GSE31210	GPL570	226	20	Okayama et al. (16)
4	GSE72094	GPL15048	442	0	Schabath et al. (17)

TCGA, The Cancer Genome Atlas; LUAD, lung adenocarcinoma.