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editorial
. 2018 Sep 18;81(4):347–348. doi: 10.4046/trd.2018.0071

Figure 1. Comparison between Global Initiative for Chronic Obstructive Lung Disease (GOLD) 2007 and 2017 classification. FEV1: forced expiratory volume in 1 second; CAT: Chronic Obstructive Pulmonary Disease Assessment Test; mMRC: modified Medical Research Council.

Figure 1