Adjuvant chemotherapy has become an essential part for the treatment of stage IB-IIIA NSCLC patients based on 4 randomized clinical trials showing survival advantage for patients who received adjuvant CT, oncologists initially started to adapt this modality of treatment for pathologically stage IB-IIIA NSCLC patients [4]. Herein, NSCLC patients will be treated in the adjuvant setting with conventional doublet platinum-based chemotherapy followed by 5-azacitidine, a demethylating agent. The planned dosages to be used in this trial have been extensively studied in previously conducted clinical trials involving all therapeutic agents.