Figure 3
A. Box and whisker plots for extracellular glutathione in induced sputum at the four study visits when induced sputum samples were collected. Whiskers represent minimum and maximum values, box represents 25 and 75 percentiles, • represents median values. Visit 3 at the end of placebo run-in phase defines the baseline. B. Box and whisker plots for extra-cellular glutathione in blood plasma at the four study visits when blood samples were collected. Whiskers represent minimum and maximum values, box represents 25 and 75 percentiles, • represents median values. Visit 3 at the end of placebo run-in phase defines the baseline.