we evaluated endogenous renal 1,25-dihydroxyvitamin d ( 1,25-oh ) 2d ) synthesis by compartmental analysis of the plasma disappearance of injected [ 3h ] 1,25-dihydroxyvitamin d3 in 11 subjects with serum 1,25- ( oh ) 2d concentrations varying from 9-154 pm ( normal , 89 +/- 25 pm ) .
C0032105
plasma
C0229671
serum