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. 2018 Apr 4;16:87. doi: 10.1186/s12967-018-1458-y

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© The Author(s) 2018

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 (DFS) was significantly longer in patients with low, compared to high, PD-1 and PD-L1 expressions (p = 0.006, log-rank) (a) (p = 0.001, log-rank) (b). DFS did not differ significantly between patients with low vs high PD-L2 expression (p = 0.657, log-rank) (c)