GYPA and eosinophilic granulomatosis with polyangiitis: PMN from patients with MPA (n = 23) had decreased burst capacity compared to GPA (n = 73; p < 0.05) and EGPA patients (n = 8; p < 0.05) after PMA activation (Fig. 2), whereas no significant differences were observed after E. coli stimulation (data not shown).