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. 2017 Jul 21;12:122. doi: 10.1186/s13014-017-0848-2

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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. 2 — Disease-free survival curves according to stage group in 7-TNM and 8-TNM. Curves of the stage group by 7-TNM a, and stage group by 8-TNM b. 7-TNM, seventh American Joint Committee on Cancer TNM staging system; 8-TNM, eighth American Joint Committee on Cancer TNM staging system