1. Nephrology Division, Department of Medicine, Michael E. Debakey VA Medical Center, Houston, TX (S.S.T.).
2. Nephrology Division, Department of Medicine, Baylor College of Medicine, Houston, TX (S.S.T., J.W., M.W.H., Z.H., W.E.M.).
3. Cardiology Division, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (G.D.).
4. Center for Metabolic and Degenerative Diseases, Institute of Molecular Medicine, The University of Texas Health Science Center, Houston (K.E.-M.).
5. Nephrology Division, Department of Medicine, Università degli Studi di Genova, Genoa, Italy (D.V., G.G.).
6. Cardiology Division, Department of Medicine, McGovern Medical School at the University of Texas Health Science Center, Houston (H.T.).