DCs in BAL fluid and blood: comparison of the study arms. Shown are the concentrations of myeloid and plasmacytoid DCs in BAL fluid (upper panel) and peripheral blood (lower panel) prior to the first inhalation of the study drug (open boxes) and directly after 4 weeks of inhalation (grey boxes). Boxplots display the median (line within the box), interquartil range (edges of the box) and extremes (vertical lines). Outliers (all cases more distant than 1.5 interquartil ranges from the upper or lower quartil) were omitted in the graphs. Significant differences between the two time points (p < 0.05) are marked with an asterisk. Abbreviations denote: Group (n = 14) assigned to Placebo (P), group (n = 14) assigned to Fluticasone (F), group (n = 14) assigned to Fluticasone and Salmeterol (F+S).