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. 2017 May 18;12:1491–1501. doi: 10.2147/COPD.S136023

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© 2017 Menezes et al. This work is published and licensed by Dove Medical Press Limited

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Change in COPD classification from baseline to follow-up using (A) GOLD 2007² criteria and (B) 2013 criteria.⁶

Abbreviation: GOLD, Global Initiative for Chronic Obstructive Lung Disease.