Objective To investigate the value of epidermal growth factor receptor tyrosine kinase inhibi-tors(EGFR-TKI)in maintenance treatment of patients with locally advanced non-small cell lung cancer(NSCLC)after concurrent chemoradiation. Methods Eighty-eight patients with advanced NSCLC without progression afterconcurrent chemoradiation were randomized to TKI group(gefitinib 250 mg once daily or erlotinib 150 mg once dai-ly)and placebo group. The duration of maintenance treatment was 1 year. If the patient.s con...