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. 2020 Oct 15;7:571154. doi: 10.3389/fmed.2020.571154

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Copyright © 2020 Pei, Zhang, Fu, Ba, Yue, Zhao and Dai.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Staging migration and survival curves based on the pN stage and mpN stage. (A) staging migration between the tumor-node-metastases (TNM) and mTNM classification in the training cohort; (B) staging migration between the TNM and mTNM classification in the validation cohort; (C) survival curve for pN stage in the training cohort; (D) survival curve for mpN stage in the training cohort; (E) survival curve for pN staging in the validation cohort; (F) survival curve for mpN stage in the validation cohort.