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Number of isolated airway myocytes that expressed IL-13 and TGF-β1 measured by flow cytometry. a Bars represent the mean + SEM. b Scatter graphs showing that the number of isolated airway myocytes that expressed TGF-β1 was correlated inversely with GSH levels in myocytes (upper panel) and directly with Rmax (lower panel). *P < 0.05 compared with the control (unpaired Student’s t-test). r = Spearman correlation coefficient; P = paired Student’s t-test
