1. Department of Molecular and Integrative Physiology (J.R., S.K., W.E.R.), University of Texas Southwestern Medical Center, Dallas, Texas 75235
2. University of Michigan, Ann Arbor, Michigan 48109; Department of Internal Medicine (A.M.L., R.J.A.), University of Texas Southwestern Medical Center, Dallas, Texas 75235
3. University of Michigan, Ann Arbor, Michigan 48109; Division of Pediatric Endocrinology (J.M.S.), University of Texas Southwestern Medical Center, Dallas, Texas 75235
4. Specially for Children, Austin, Texas 78723; Department of Pediatrics (J.Z.K.-V.), University of Texas Southwestern Medical Center, Dallas, Texas 75235
5. University of Michigan, Ann Arbor, Michigan 48109; Department of Pathology (H.S., Y.N.), University of Texas Southwestern Medical Center, Dallas, Texas 75235
6. Tohoku University School of Medicine, Sendai, 980-8575 Japan; Division of Pathology, Faculty of Medicine (Y.N.), University of Texas Southwestern Medical Center, Dallas, Texas 75235
7. Tohoku Medical and Pharmaceutical University, Sendai, Miyagi 981-8558, Japan; and Department of Pediatrics (P.C.W.), University of Texas Southwestern Medical Center, Dallas, Texas 75235