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. 2018 Sep 21;26:83. doi: 10.1186/s13049-018-0548-4

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© The Author(s). 2018

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 — Average number of cancelled missions (left side diagram) and average number of missions cancelled due to crew availability (right side diagram) in the period 2006 to 2013 for HEMS helicopters belonging to Helse Nord, Helse Midt-Norge and Helse Sør-Øst