During the past review year, researchers have discovered the molecular path
ogeneses of disorders of calcium, vitamin D and bone, This review discusses
the roles of the extracellular calcium sensor, the renal 25-hydroxyvitamin
D-1 - alpha-hydroxylase, the vitamin D receptor, and new factors for bone
cell embryogenesis and function as a way of introduction to this exciting a
rea of medicine, Curr Opin Pediair 2000, 12:135-139 (C) 2000 Lippincott Wil
liams & Wilkins, Inc.