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Kaplan–Meier analyses for RFS (A) and OS (B) based on postoperative immunotherapy. (A) RFS in the AC group versus the AC + IM group in patients with positive lymph node metastasis; (B) OS in the AC group versus the AC + IM group in patients with positive lymph node metastasis. AC, adjuvant chemotherapy; AC + IM, combined adjuvant chemotherapy and immunotherapy; OS, overall survival; RFS, relapse‐free survival.
