Reproducibility between two measurements in B6;129 mice.

<p>The first measurement (○) was obtained at least 7 days before the second measurement (•) on 22 WT (A) and 21 <i>cftr</i>^-/- mice (B). The difference between the two ΔV_TELowCl^- values was plotted against their mean, as described by Bland and Altman, for the 22 WT (C) and 21 <i>cftr</i>^-/- (D) mice.