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. 2018 Jul 3;47:43. doi: 10.1186/s40463-018-0290-y

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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. 4 — Comparison of middle ear compliance (MEC) between healthy ET and PET subjects at the 678 Hz probe tone frequency. The y-axis represents MEC, measured in mmho. The x-axis displays each respective group, with healthy ET represented by the blue bar, and PET represented by the red bar. It was found that the PET group had significantly higher MEC than the healthy ET group during testing with forced respiration (p = 0.04)