Randomization
Cancer
CANCER
The eligible patients were randomly assigned (1:1) to receive gefitinib plus pemetrexed with platinum chemotherapy or gefitinib alone. Random assignment was performed using a computer-generated randomization sequence. The Clinical Trials Center of Sun Yat-Sen University Cancer Center generated the randomization sequence, confirmed participant eligibility, assigned the eligible patients to trial groups, and notified investigators of treatment allocation for each patient. Patients and investigators were not blinded to treatment allocation.