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Fractional excretion of phosphate (FEPO4) values in patients with pre-transplantation FGF23 concentrations below the median value (closed bars) as compared to patients with pre-transplantation fibroblast growth factor 23 (FGF23) values above the median (open bars). The shaded area represents the normal range. Post-operative renal phosphate excretion was related to both pre-operative FGF23 (p<0.01) and time (p<0.001).
