Fig. 6From: Appropriate use of a dry powder inhaler based on inhalation flow patternNumber of subjects who fulfilled the criteria at each trial. a; subject number who achieved all three criteria. b; those who reached PIFR threshold. c; those who reached TPF threshold. d; those who reached VI threshold. In the 1st session, subjects started the inhalation trial with either Diskus or Turbuhaler. In the 2nd session they selected the other DPIBack to article page