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Overall survival curves. (A) The OS of patients without EGFR mutation is significantly longer than that with EGFR mutation. (B) The OS of patients with low PD-L1 in tumor is significantly longer than that with high PD-L1. (C) The OS of patients with tumor size of T1/2 is significantly longer than that with tumor size of T3/4. (D) The OS of patients without lymph node metastasis is significantly longer than that with lymph node metastasis. Fig 1.
