187. THERAPEUTIC MYELOPEROXIDASE INHIBITION ATTENUATES NEUTROPHIL ACTIVATION, ANCA-MEDIATED ENDOTHELIAL DAMAGE AND CRESCENTIC GLOMERULONEPHRITIS. (29th March 2019) - Antonelou, Marilina; Michaëlsson, Erik; Wang, Chunjing; Walker, Lucy; Unwin, Robert; Salama, Alan