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. 2024 Oct 11;17:1001–1014. doi: 10.2147/JAA.S479215

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© 2024 Chen et al.

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Correlation matrix diagram of different lung function parameters and questionnaires. FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity; FEF25-75%, forced expiratory flow at 25–75%; ACQ-5, asthma control questionnaire-5; CAT, COPD assessment test.