Figure 3From: Cough response to isocapnic hyperpnoea of dry air and hypertonic saline are interrelatedThe cumulative number of coughs in relation to minute ventilation evoked by isocapnic hyperpnea of dry air challenge in each (a) healthy (n = 10) and (b) asthmatic (n = 30) subject. The horizontal lines at or below zero indicate subjects who did not cough at all.Back to article page