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Distribution of semiquantitative severity scores for each of the adjudicated 13 histopathological lesions in the Boston Kidney Biopsy Cohort. The histopathologic categories were graded by percentage of renal cortical volume or affected glomeruli: none, ≤10%; mild, 11%–25%; moderate, 26%–50%; and severe, >50%. ATI, acute tubular injury; IFTA, interstitial fibrosis and tubular atrophy.
