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ANCA type, histopathological ANCA-GN Class, renal risk score (RRS) in KB1 and KB2 in patients with active ANCA-GN in KB2 (n = 11). (a) ANCA-GN histopathological class in KB1 and KB2. (b) Renal Risk Score in KB1 and KB2. ANCA-GN, ANCA-glomerulonephritis; KB1, initial kidney biopsy; KB2, repeat for-cause kidney biopsy; MPO, myeloperoxidase; PR3, proteinase-3. aBased on criteria used by the International Working Group of Renal PathologistsS3 Renal Risk Score.S4
