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. 2016 Apr 30;14:136. doi: 10.1186/s12957-016-0898-1

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© Tokuhara et al. 2016

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 — a Kaplan–Meier relapse-free survival (median follow-up time 42 months) of all cases. b Kaplan–Meier overall survival (median follow-up time 42 months) of all cases. RFS relapse-free survival, OS overall survival