1. Department of Medicine (J.S.M., S.C., E.D., A.K., S.K., M.R.R.), New York, New York 10032
2. Division of Endocrinology, Metabolic Bone Diseases Unit, and and Department of Pathology (D.W.D.), College of Physicians and Surgeons, Columbia University, New York, New York 10032
3. Regional Bone Center, Helen Hayes Hospital (D.W.D., H.Z.), West Haverstraw, New York 10993