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Spearman correlation between urinary and serum melamine concentrations as well as urinary melamine concentrations and early renal tubular injury markers in urine by worksites. (A) Urinary and serum melamine concentrations (n=39). (B) Urinary melamine concentrations and NAG levels (n=80). (C) Urinary melamine concentrations and microalbumin levels (n=80). Cr, creatinine.
