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. 2015 Nov 24;13:320. doi: 10.1186/s12957-015-0737-9

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© Yuan et al. 2015

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 — Overall survival curves (group 1, black line; group 2, red line). The group-specific 5-year overall survival (OS) rates were 56.12 % in group 1 and 40.38 % in group 2 (p = 0.03). These differences were statistically significant