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. 2019 Nov 21;25(43):6451–6464. doi: 10.3748/wjg.v25.i43.6451

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©The Author(s) 2019. Published by Baishideng Publishing Group Inc. All rights reserved.

This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial.

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Survival curves of the clinical TNM staging. A: The discrimination between the survival curves of each stage of the clinical TNM (cTNM) system in the training set was good (P < 0.05). B: There was no significant difference in the survival curves between the cTNM stages I and II A (P = 0.935), and between stages III and IVA (P = 0.355). cTNM: Clinical TNM.