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Kaplan-Meier survival curve showing the survival after regrouping. A. The overall survival (OS) in the N0-1aTDs ≤ 4 and N1bTDs-. B. The OS in the N1bTDs ≤ 4 and N2aTDs-. C. The OS in the N2aTDs ≤ 4 and N2bTDs-. D. The OS in the N1a-bTDs > 4 and N2bTDs ≤ 4. E. The OS in the N2TDs > 4.
