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. 2018 Nov 9;15:44. doi: 10.1186/s12989-018-0281-1

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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. 5 — Electroencephalography (EEG) monitoring in rats after 3 and 6 months of exposure to traffic-related air pollution. The relative power, absolutely power, and multiscale entropy (MSE), of rats in the control, high-efficiency particulate air (HEPA), and particulate matter with an aerodynamic diameter of < 1 μm (PM₁) after 3 and 6 months of exposure were calculated. There were no significant differences in the four frequency bands (delta, theta, alpha, and beta) of relative power, absolutely power, or MSE among the control, HEPA, and PM₁ groups after 3 and 6 months of exposure