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. 2017 Mar 17;15:64. doi: 10.1186/s12957-017-1098-3

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© The Author(s). 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. 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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Fig. 1 — Kaplan-Meier curve analyses of overall survival of patients with pathological T1 IAC or SCC. Overall survival was stratified by lymph node involvement (a), IAC lymph node involvement (b), or SCC lymph node involvement (c)