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Flow diagram showing the progress of the study. A-Meg, A-megalin; C-Meg, C-megalin; PCX, podocalyxin; L-FABP, liver-type fatty acid binding protein; ALB, albumin; NGAL, neutrophil gelatinase-associated lipocalin; β2-MG, β2-microglobulin; α1-MG, α1-microglobulin; NAG, N-acetyl-β-D-glucosaminidase.
