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Survival cures for DFS (A,C) and OS (B,D) according to surgical procedures in stage I lung adenocarcinoma patients with tumor size ≤2 cm. (A,B) Survival cures for patients with tumor size ≤1 cm; (C,D) survival cures for patients with tumor size >1 but ≤2 cm. P values from log-rank test. DFS, disease-free survival; OS, overall survival; Seg., segmentectomy; Lob, lobectomy.
