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. 2016 Nov 3;26:16061. doi: 10.1038/npjpcrm.2016.61

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Copyright © 2016 The Author(s)

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Consort diagram. COPD, chronic obstructive pulmonary disease; ICS, inhaled corticosteroid; LABA, long-acting beta-agonist; LAMA, long-acting muscarinic antagonist; OPCRD, Optimum Patient Care Research Database.