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Uniformity of dose delivery from three salbutamol-containing multi-dose powder inhalers. Buventol Easyhaler® (200 μg/dose), Inspiryl Turbuhaler® (100 μg/dose) and Ventolin Diskus® (200 μg/dose) at different flow rates. The delivered dose is expressed as a percentage of the nominal labelled dose. Each data point represents a single-dose actuation (reproduced with permission)
