the serum concentrations of 25-hydroxycholecalciferol ( 25ohd3 ) , 25-hydroxyergocalciferol ( 25ohd2 ) , 24,25-dihydroxyvitamin d ( 24,25 ( oh ) 2d ) , and 1,25-dihydroxyvitamin d ( 1,25 ( oh ) 2d ) were measured in 10 normal subjects every 2 months for 1 year .
C0006657
25-hydroxycholecalciferol
C2713074
25ohd3