Even in the larger dataset with 41 never smokers from TCGA, only 8 genes are found with recurrent mutations (C21orf99, FAM182B, CCDC144C, FLJ36000, DDX11L2, EEF1B2, FRG1B, and EGFR; the level II somatic mutation data for lung adenocarcinoma was downloaded from TCGA athttp://cancergenome.nih.govin February 2013). Here, DDX11L2 is linked to lung adenocarcinoma.