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Kaplan-Meier survival curves of prognostic Stage I, II, and III altered from anatomic Stage II by using the AJCC 8th edition. (a) Kaplan-Meier survival curves for DFS (P=0.039). (b) Kaplan-Meier survival curves for OS (P=0.079). DFS: Disease-free survival; OS: Overall survival; AJCC: American Joint Committee on Cancer.
