Figure 4.

A. Box and whisker plots for TNF-α 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 IL-8 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 runin phase defines the baseline.