1. Divisions of Endocrinology and Metabolism (R.J.A., S.S., N.C.), University of Texas Southwestern Medical Center, Dallas, Texas 75390-8857
2. Department of Endocrinology Laboratory (D.W.C.), Esoterix, Incorporated, Calabasas Hills, California 91301
3. Department of Internal Medicine, Division of Gastrointestinal and Endocrine Surgery, Department of Surgery (F.E.N., S.A.H.), University of Texas Southwestern Medical Center, Dallas, Texas 75390-8857
4. Division of Vascular and Interventional Radiology, Department of Radiology (B.L.D., S.C.J., C.K.T., J.L.), University of Texas Southwestern Medical Center, Dallas, Texas 75390-8857
5. Departments of Pathology (F.H.W.), University of Texas Southwestern Medical Center, Dallas, Texas 75390-8857
6. Department of Hypertension (W.V., S.D.N., R.G.V.), University of Texas Southwestern Medical Center, Dallas, Texas 75390-8857
7. Department of Clinical Sciences (D.L.), University of Texas Southwestern Medical Center, Dallas, Texas 75390-8857