Fig. 2. Levels of interleukin 1β (IL-1β;  A ), interleukin 8 (IL-8;  B ), and tumor necrosis factor α (TNF-α; (  C ) were measured by enzyme-linked immunosorbent assay in tracheal lavage fluid. Data are presented as median (pg/ml) with 25th–75th percentiles (  boxes ) and 5th–95th percentiles (  whiskers ). Differences not significant by Friedman and Wilcoxon test.