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Figure 5: Bland-Altman plots constructed from the least mean square (LMS) and impulse oscillometry (IOS) data at each specific frequency (percentage of change) with mean (bias), ±LOA, and best-fit values of linear regression (slope, , value) after administration of intravenous bethanechol. LOA, limit of agreement; Upper LOA, mean difference (bias) + 1.96 SD; Lower LOA, mean difference (bias) −1.96 SD; , squares. The value is testing the null hypothesis that the overall slope is zero.