title: Letter: Phosphorus restriction and vitamin D metabolism.
mesh_terms: D006801:Humans; D006887:Hydroxycholecalciferols / Q000096:biosynthesis; D007668:Kidney / Q000378:metabolism; D007676:Kidney Failure, Chronic / Q000378:metabolism; D010281:Parathyroid Hormone / Q000502:physiology; D010758:Phosphorus / Q000378:metabolism*; D014807:Vitamin D / Q000378:metabolism*
chemical_list: D006887:Hydroxycholecalciferols; D010281:Parathyroid Hormone; D014807:Vitamin D; D010758:Phosphorus