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. 2017 Oct 20;21:254. doi: 10.1186/s13054-017-1852-5

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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. 1 — Bar graph showing the proportion of patients with diffuse alveolar damage (DAD) according to radiologic severity (extent of opacities on chest radiographs) in mild, moderate, and severe acute respiratory distress syndrome (ARDS). All in all, DAD was significantly more frequent in patients with extensive infiltrates involving the four quadrants than in the others: 101 (59%) of 171 patients with four quadrants vs. 58 (31%) of 185 patients with two or three quadrants (p < 0.001)