Among the four NSCLC cell lines, they have different EGFR genetic mutations, H1975 harbors L858R and T790M double mutation on EGFR, H820 harbors exon 19 in frame deletion and T790M double mutation on EGFR, while A549 and H358 have wild-type EGFR. Here, EGFR is linked to non-small cell lung carcinoma.