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Limits of agreement and Bland–Altman plots for glomerular filtration rate measured (GFR) between the two-compartment model (CL2) with (A), the one-compartment (CL1), (B) the simplified two-compartment model (SM) and (C) the one-compartment adjusted by a formula (CL1f). The procedure compares the difference between two methods versus the difference of the means of both methods. The straight and dashed lines indicate mean difference and 95% limits of agreement, respectively.
