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. 2019 Oct 3;14:2267–2272. doi: 10.2147/COPD.S213519

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© 2019 Bártholo et al.

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Recruitment flowchart.

Abbreviations: COPD, chronic obstructive lung disease; ACO, asthma/COPD overlap; FE, frequent exacerbator, pulmonary comorbidities included, tuberculosis sequelae, pulmonary fibrosis and lung cancer.