1. Division of Endocrinology and Metabolism (R.M.C., L.P., M.B.T., A.F.S., M.J.H.), University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania 15213
2. Graduate School of Public Health (S.M.S.), The University of Pittsburgh, Pittsburgh, Pennsylvania 15261
3. University of Pittsburgh School of Medicine, and Magee-Womens Hospital (M.H.), University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania 15213
4. Department of Pediatrics (B.W.H.), Medical University of South Carolina, Charleston, South Carolina 29403
5. Department of Orthopedics (C.M.G.), Yale University of Medicine, New Haven, Connecticut 06510