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. 2017 Jun 27;3(2):267–281. doi: 10.1007/s41030-017-0046-2

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© The Author(s) 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, 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.

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Fig. 2 — SABA short-acting β₂-agonist, SAMA short-acting antimuscarinic antagonist, LABA long-acting β₂-agonist, LAMA short acting antimuscarinic antagonist, ICS inhaled corticosteroid