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. 2017 Feb 23;18:40. doi: 10.1186/s12931-017-0522-0

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© The Author(s). 2017

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. 6 — Relationship between M1 alveolar macrophages and lung function. Correlation between percentage of M1 (iNOS⁺) alveolar macrophages and FEV₁/FVC (%) in all the subjects of the study, excluding donors who did not have lung function. Spearman rank correlation r = −0.67 and p < 0.0001