Figure 3From: Intestinal current measurement versus nasal potential difference measurements for diagnosis of cystic fibrosis: a case–control study Correlation between the average ΔIsc (forskolin/IBMX + carbachol + histamine) (ICM) and average Δ0Cl - + Iso (NPD). The normal range is shown left of the dotted line. The intermediate range is shown between the solid and dotted lines. A higher ΔIsc (forskolin/IBMX + carbachol + histamine) represents a better CFTR response.Back to article page