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A, Lung volumes. B, Spirometry. Data are presented as mean and SD. Predicted values for spirometry and lung volumes were based on the norms of Knudson et al,13,14 and Goldman and Becklake,16 respectively. Dotted lines represent the normal range.20 FRC = functional residual capacity (reported as %TLC); MVV = maximal voluntary ventilation; PEF = peak expiratory flow; %pred = percent predicted; RV = residual volume (reported as % total lung capacity); TLC = total lung capacity. *P < .05.
