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. 2018 Aug 10;15:34. doi: 10.1186/s12989-018-0270-4

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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. 1 — Heat map and hierarchical clustering analysis results. Bayview A – Bayview Ambient (“without” mask); Bayview M- “with” mask; Biomarker levels are expressed as fold changes with respect the subject’s average biomarker level through the entire exposure period (Red-upregulation; Green-down-regulation)