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. 2019 Nov 21;23:367. doi: 10.1186/s13054-019-2635-y

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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 — Flowchart of participants included in analysis. *Biologically implausible values defined as plateau pressure less than PEEP (n = 5) or plateau pressure less than 5 cm H₂O (n = 6)