A reduced expression of the vitamin D receptor ( VDR ) in parathyroid glands of uremic animals and humans has been observed .
a reduced expression of the vitamin d receptor ( vdr ) in parathyroid glands of uremic animals and humans has been observed .
O O O O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O O O O B-body_part I-body_part O B-multi_cell I-multi_cell O B-multi_cell O O O O