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. 2016 Mar 16;11:567–575. doi: 10.2147/COPD.S99786

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

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Flowchart of selecting the subjects with airflow limitation or normal lung function.

Abbreviations: FEV₁/FVC, forced expiratory volume in 1 second to forced vital capacity; FEV₁% predicted, forced expiratory volume in 1 second as percentage of predicted.