therefore , the normal or low 1,25-dihydroxyvitamin d3 ( 1,25- ( oh ) 2d3 ) concentrations in xlh patients could be due to accelerated catabolism of 1,25- ( oh ) 2d3 or abnormally regulated 25ohd3-1 alpha-hydroxylase in response to hypophosphataemia , although significantly elevated above that in normal controls .
C3536983
in xlh
C2713074
25ohd3