CXCL8 and eosinophilic granulomatosis with polyangiitis: 1. Significant differences were only observed in serum levels of MDC, IL-8, MIP-1α and 1ß, and TNF-α, each of which were lower in active EGPA than in healthy controls, and differences between active EGPA and other disease groups did not reach significance. 2. Comparison between sera from active or inactive EGPA were not significance for any of the studied cytokines/chemokines.