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The absorptive component of In-DTPA clearance in central and peripheral lung zones in CF and control subjects. Absorptive clearance is calculated as the difference between the total In-DTPA clearance rate and the Tc-SC (mucociliary) clearance rate in each subject. Data is reported as percent cleared over 60 minutes. Central lung p=0.03, peripheral lung p=0.14 by Mann-Whitney test.
