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. 2021 Apr 5;12(11):3299–3306. doi: 10.7150/jca.55097

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Kaplan-Meier survival curve for overall survival according to the AJCC 8^th TNM and novel TNM (nTNM) staging systems. A: the AJCC 8^th TNM staging system in the training cohort; B: the nTNM staging system in the training cohort; C: the AJCC 8^th TNM staging system in the validation cohort; D: the nTNM staging system in the validation cohort.