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. 2018 Aug 14;28:31. doi: 10.1038/s41533-018-0098-2

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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 images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — Mean values for forced expiratory volume in 1 s in patients with exercise-induced asthma treated with a short-acting β₂-agonist.⁷⁰ Data are expressed as a percentage of the predicted normal value, measured before and 30 min after each treatment and for 15 min after exercise. Crossover study conducted in 27 patients. Reproduced from Anderson et al. (2001) with permission from Wolters Kluwer Health, Inc. DPI dry powder inhaler, FEV₁ forced expiratory volume in 1 s, pDMI pressurised metered dose