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Correlation between urinary EGF and serum magnesium (A; r = 0.583; p<0.001) and urinary EGF and the FE Mg2+ (B; r = -0.248; p = 0.014). uEGF: urinary epidermal growth factor; uCr: urinary creatinine; BSA: body surface area; sMg2+: serum magnesium; FE Mg2+: fractional excretion of magnesium.
