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. 2020 Aug 28;10:1499. doi: 10.3389/fonc.2020.01499

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Copyright © 2020 Wang, Ge, Wang, Zhang, Zhou, Lin, Qie, Hu, Wang, Liu, Pang, Li, Chen, Liu, Zhang, Li, Shi, Deng, Li, Ni, Chang, Han, Deng, Wang, Liang, Bi, Zhang, Liu, Wang, Zhai, Feng, Chen, Zhou, Zhao, Sun and Xiao.

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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Locoregional recurrence (A) by T category, (B) by lymph node status, (C) by tumor length, and (D) by tumor response. CR indicates radiologic complete response. N0, negative lymph node. N+, positive lymph node.