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. 2020 Dec 22;15:3385–3396. doi: 10.2147/COPD.S277782

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© 2020 Ichinose et al.

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Correlations between the total activity time in patients achieving ≥2 METs and patient-reported durations of activities equivalent to ≥2 METs.

Abbreviations: MET, metabolic equivalent; Q, quartile; SD, standard deviation.