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. 2018 Apr 11;18:405. doi: 10.1186/s12885-018-4314-9

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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. 5 — Prognosis of the low- and high-risk groups in PR-negative and PR-positive samples. a Kaplan–Meier survival curves of the low- and high-risk groups in PR-negative samples. The black line indicates the low-risk group, and the red line indicates the high-risk group. P-value indicates the significance of the difference between the two groups. b Kaplan–Meier survival curves of the low- and high-risk groups in PR-positive samples. The blue line indicates the low-risk group, and the violet line indicates the high-risk group. P-value indicates the significance of the difference between the two groups. c Combination of the Kaplan–Meier survival curves from (a) and (b)