a comparison between patients in whom stones form and controls in terms of the quantitative biochemical parameters evaluated ( serum calcium , uric acid and inorganic phosphate , and urine calcium , uric acid , inorganic phosphate , oxalic acid , xanthine and alpha-amino-nitrogen ) showed a significant difference only with respect to excretion of urinary oxalate by adults , which was higher in patients in whom stones form .
C0069715
oxalic
C0029988
oxalate