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. 2016 May 26;17:63. doi: 10.1186/s12931-016-0380-1

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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 — Rate of therapeutic response to combination therapy evaluated by improvement of FEV₁ or CAT score. Sixty-two percent of patients showed an increase in FEV₁ greater than 100 mL and the same proportion had a decrease in CAT score of greater than 2 points. When the results of FEV₁ and CAT score were combined, the overall response rate of the combination therapy was 82 %