serum vitamin d3 concentrations reached peak levels 24 h after uvr exposure , and the mean values in the untreated and calcitriol-treated subjects were similar : 13.5 +/- 0.6 ( +/- sd ) ng/ml ( 35.1 +/- 1.5 nmol/l ) and 13.0 +/- 0.6 ng/ml ( 33.8 +/- 1.5 nmol/l ) , respectively ( p greater than 0.1 ) .
C0008318
vitamin d3
C0006674
calcitriol