to determine if levels of serum total homocysteine are elevated in patients with either cobalamin or folate deficiency , we utilized a new capillary gas chromatographic-mass spectrometric technique to measure total homocysteine in the serum of 78 patients with clinically confirmed cobalamin deficiency and 19 patients with clinically confirmed folate deficiency .
C0042845
cobalamin
C0042847
cobalamin deficiency