Urinary excretion of toxic metals (A) lead (Pb), (B) gadolinium (Gd), and (C) cadmium (Cd) over time (0, 6, 24, 48, and 72 h) following EDTA infusion at three doses (0.5, 1, and 3 g). Urinary metal concentrations were normalized for hydration status using urine specific gravity.