serum levels of the dihydroxylated metabolite of vitamin d3 , 24,25-dihydroxycholecalciferol ( 24 , 25 ( oh ) 2d3 ) were measured by competitive protein-binding assay in 2 anephric patients while undergoing therapy with 25-hydroxycholecalciferol ( 25 ( oh ) d3 ) and , at a later date , vitamin d2 , ergocalciferol .
C0006657
25-hydroxycholecalciferol
C2713074
25 ( oh ) d3