CDKN2A and non-small cell lung carcinoma: The most frequently mutated genes were EGFR (178 of 256, 69.5%), TP53 (145 of 256, 56.6%), ERBB2 (25 of 256, 9.8%), CDKN2A (20 of 256, 7.8%) and KRAS (18 of 256, 7.0%), which had all been reported as well‐known driver genes of NSCLC.