When exclusively smokers were examined (thereby enriching the sample for KRAS-mutant patients), high KRAS/CCL2/IL1B expression levels portended 128% increased odds of death in LUAD (Figure 7c, lower left) and continued to have no impact on the survival of patients with squamous cell lung carcinoma (Figure 7c, lower right). This evidence concerns the gene KRAS and squamous cell lung carcinoma.