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. 2019 Mar 12;20:54. doi: 10.1186/s12931-019-1011-4

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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. 3 — Elevation of PCT was positively correlated with increased CXCR5 + CD8+ T cells. a, Levels of circulating CXCR5 + CD8 + T cells between patients with PCT > 0.05 and PCT < 0.05 ng/ml. b, Scatterplot of CXCR5 + CD8+ T cell vs PCT. Each point in the scatter plot represents the value of two variables for a given observation. The rank Spearman correlation coefficient confirms that ratio of CXCR5 + CD8+ T cells and PCT are correlated