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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. 1 — The ratio of circulating CXCR5-expressing CD8+ T cells among CD8 + T cells in all individuals was determined by flow cytometry. a: tuberculosis, b: controlled HAP, c: un-controlled HAP, d: bronchiectasis, e: controlled CAP, f: progressive CAP. Representative FACS plots of CXCR5 expression in CD8+ T cells from lymphocytes are shown