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. 2018 Dec 21;8:618. doi: 10.3389/fonc.2018.00618

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Copyright © 2018 Li, Li, Wang, Pang, Di, Ren, Li, Liu, Chen, Kang, Wang and Xia.

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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Kaplan-Meier curves for the cohort illustrating for local recurrence-free survival (LRFS), regional recurrence-free survival (RRFS) and distant metastases-free survival (DMFS).