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Thresholds for clinically important deterioration versus improvement in COPD health status: results from a randomised controlled trial in pulmonary rehabilitation and an observational study during routine clinical practice

Crossref DOI link: https://doi.org/10.1136/bmjopen-2018-025776

Published Online: 2019-06-28

Published Print: 2019-06

Update policy: https://doi.org/10.1136/crossmarkpolicy

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