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. 2019 Sep 11;9:101. doi: 10.1186/s13613-019-0578-8

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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.

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Fig. 2 — Last physiological parameters recorded at the bedside under high-flow nasal oxygen therapy before the first separation attempt. a Box-plot of FiO₂ according to the success or failure of the first separation attempt (p = 0.02). b Box-plot of the ROX index according to the success or failure of the first separation attempt (p = 0.002)