Figure 2From: Validation of the ERS standard citric acid cough challenge in healthy adult volunteersChange in log C2 from baseline at 1,2,4 hrs and 2 wks. Percentage change in log C2 from baseline in repeated cough challenge at 1,2,4 hrs and 2 wks comparing KoKo DigiDoser with the Mefar dosimeterBack to article page