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. 2016 Oct 27;20:346. doi: 10.1186/s13054-016-1457-4

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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 — Flow chart of the study. One patient fulfilled the inclusion criteria but was not included because of extubation during the weekend with no investigator available. BMI body mass index, SBT spontaneous breathing trial