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Table 4 Different modalities used in different devices to check that the product was actually delivered

From: COPD: adherence to therapy

  Breezhaler® Handihaler® Respimat® Genuair® Diskus® Turbohaler®
Auditory certainty YES NO NO YES NO NO
Gustatory certainty YES YES NO NO NO NO
Visual certainty YES (capsule empty) NO Indirect (Plume) Indirect (window) NO NO
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