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. 2021 Jan 15;16:101–111. doi: 10.2147/COPD.S284720

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© 2021 Zhudenkov et al.

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Estimated hazard ratio per 100 mL improvement in FEV₁ per study arm for each study; for the reference arm alone (filled circles) and each treatment arm vs reference (open circles). Error bars represent 95% CI.

Abbreviations: Form, formoterol; Bud, budesonide.