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Forest plot of HR for (A) PFS and (B) OS of patients with NSCLC receiving the combination of gefitinib and platinum-based chemotherapy (carboplatin plus pemetrexed) versus gefitinib monotherapy. CBDCA, carboplatin; CI, confidence interval; HR, hazard ratio; OS, overall survival; PEM, pemetrexed; PFS, progression-free survival.
