low plasma calcitriol ( 1,25-dihydroxycholecalciferol ) and normal serum calcifediol ( 25-hydroxycholecalciferol ) levels were noted during the evaluation of an 11-year-old girl with diffuse osteoporosis and pathologic fractures .
C0006674
calcitriol
C0012328
dihydroxycholecalciferol