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. 2019 Feb 1;8:20. doi: 10.1186/s13584-019-0291-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. 5 — a The frequency distribution of the duration-of-ventilation of 745 patients ventilated on the university hospital’s internal medicine wards is rightward skewed. b Displayed is the frequency distribution of the ages of 745 patients ventilated on the internal medicine wards of the university hospital