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. 2014 Nov 22;9(1):60. doi: 10.1186/2049-6958-9-60

Table 4.

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

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

®, trademark.