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Correlation of estimated GFR (eGFR; by MDRD) and total GFR (tGFR; sum of the single-kidney GFRs by MRR). Regression equation is tGFR = 0.37 eGFR + 31.2, and correlation coefficient r = 0.522 (P = 0.011). Solid line is identity line and dashed line is regression line.
