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. 2014 May 5;14:313. doi: 10.1186/1471-2407-14-313

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Copyright © 2014 Chen et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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The association between perineural invasion and ESCC patients’ survival (log-rank test). Kaplan-Meier survival analysis of perineural invasion for overall survival (A) and recurrence-free survival (B) in ESCC patients.