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. 2019 Mar 1;14:585–595. doi: 10.2147/COPD.S195438

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© 2019 Ghosh et al. This work is published and licensed by Dove Medical Press Limited

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Repeatability of peak inspiratory flow rate (PIFR) from baseline to 2–4 weeks, measured against R2 low–medium resistance inhaler (eg, Diskus^® and Ellipta^®; blue dashed line) and R5 high resistance inhaler (Handihaler^®; orange solid line).