Medicine 2 complement 2 immune complex 2 nephrology C3G 1 CD38 1 IgA 1 IgA Nephropathy 1 IgA Vasculitis 1 IgA nephropathy 1 IgA vasculitis 1 IgA1 1 IgAN pathogenesis 1 Immunology 1 KM55 1 O-glycosylation 1 Oxford score 1 aHUS 1 aberrantly glycosylated IgA1 1 adults 1 autoantibody 1 autoantibody (aAb) 1 biomarker 1 body mass index 1 children 1 clinical trials 1 complement C3 1 crescents 1 galactose-deficient IgA1 1 genetics 1