EGFR and non-small cell lung carcinoma: In tumor tissues of NSCLC patients, the relative expression of miR-542-5p in patients with high EGFR protein expression was significantly lower than that of patients with low EGFR protein expression (0.739 ± 0.407 vs 3.049 ± 1.194, t = 7.753, p < 0.001).