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. 2016 Jul 22;20:226. doi: 10.1186/s13054-016-1396-0

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© The Author(s). 2016

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. 2 — Network of the comparisons of the partial pressure of arterial oxygen/fraction of inspired oxygen ratio in the Bayesian network meta-analysis. The size of a given node is proportional to the number of patients (in parentheses) randomized to receive the treatment. The width of each line is proportional to the number of trials (specified next to the line) comparing the connected treatments. PEEP positive end-expiratory pressure, VT tidal volume