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. 2019 Jun 17;12:56. doi: 10.1186/s13048-019-0526-0

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© The Author(s). 2019

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 — The results of Kaplan-Meier curve analysis and Log rank test for overall survival according to the tumor PD-L1 expression groups (a, p-value = 0.449), the stromal PD-L1 expression groups (b p-value = 0.020), and the intraepithelial PD-L1 expression groups (c p-value = 0.342) in all histologic types of epithelial ovarian cancers. The results of Kaplan-Meier curve analysis and Log rank test for overall survival according to the tumor PD-L1 expression groups (d p-value = 0.448), the stromal PD-L1 expression groups (e p-value = 0.019), and the intraepithelial PD-L1 expression groups (f p-value = 0.282) in ovarian serous carcinomas