1. Department of Internal Medicine, Hypertension Section (W.V., J.M.G., D.P., A.M., G.K.), University of Texas Southwestern Medical Center, Dallas.
2. Charles and Jane Pak Center for Mineral Metabolism and Clinical Research (W.V., O.W.M., C.C.Y.P.), University of Texas Southwestern Medical Center, Dallas.
3. Department of Applied Clinical Research (J.M.G., J.W.), University of Texas Southwestern Medical Center, Dallas.
4. Advanced Imaging Research Center (T.J., J.R.), University of Texas Southwestern Medical Center, Dallas.
5. Department of Internal Medicine, Division of Nephrology (O.W.M.), University of Texas Southwestern Medical Center, Dallas.
6. Department of Physiology (O.W.M.), University of Texas Southwestern Medical Center, Dallas.