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. 2016 Sep 5;11(1):31. doi: 10.1186/s40248-016-0068-x

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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. 4 — Pairwise comparison between the three devices investigated: arrows’ direction represents which device is superior (with statistical significance according to p); e.g. the black arrow joining Genuair and Breezhaler means that Genuair results statistically superior (p < 0.05) to Breezhaler according to the number of attempts before achieving the first proper inhalation (such as, Genuair needs less attempts)