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. 2013 Sep 9;8(9):e73335. doi: 10.1371/journal.pone.0073335

Figure 5. Impact of increasing nitrogen excretion and ventilation heterogeneity on functional residual capacity.

Figure 5

In the absence of nitrogen (N2) excretion, increasing X did not change the measured FRC (black diamonds). The effect of N2 excretion on FRC and the percentage error in measured FRC are shown by the grey diamonds and open circles respectively.