Figure 1.

Baseline cytokine expression. Significantly altered baseline cytokine expression of primary nasal epithelial cells concerning G-CSF (A) and IL-8 (B) of granulomatosis with polyangiitis (GPA) patients compared to normal controls (NC). Data are represented as box plots showing the median as a straight line; the boxes correspond to the 75^th and 25^th percentiles and the whiskers indicate normal variation limits.