tokens: In 16 patients receiving treatment , median serum vitamin C increased from 1.30 ( 0.23 - 1.78 ) to 3.22 ( 1.77 - 5.96 ) mg / L ( p = 0.008 ) without increasing serum oxalate ( 79.92 ( 56.6 - 106.84 ) vs. 80.47 ( 56.88 - 102.95 ) μmol / L , p = 0.82 ) .