Figure 6From: Intestinal current measurement versus nasal potential difference measurements for diagnosis of cystic fibrosis: a case–control study Average ΔIsc (forskolin/IBMX + carbachol + histamine) (ICM) in healthy controls according to smoking status. A higher ΔIsc (forskolin/IBMX + carbachol + histamine) represents a better CFTR response.Back to article page