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. 2016 May 26;11:1087–1096. doi: 10.2147/COPD.S103256

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© 2016 Bozzetti et al. This work is published and licensed by Dove Medical Press Limited

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The plots (A and B) show FEV₁ (percentage of predicted value) plotted against FEV₁/FVC (percent of predicted value) for the participants with (red circle) and without any ILA (black cross) and participants with (red circle) and without any fibrotic ILA (black cross), respectively, and classify them according to the GOLD criteria.

Abbreviations: FEV₁, forced expiratory volume in 1 second; FVC, forced vital capacity; ILA, interstitial lung abnormality; GOLD, Global Initiative for Chronic Obstructive Lung Disease.