1. Dallas Veterans Affairs Medical Center Dallas Texas USA
2. University of Texas Southwestern Medical Center Department of Internal Medicine, Division of Cardiology Dallas Texas USA
3. Selzman Institute for Kidney Health, Section of Nephrology, Department of Medicine Baylor College of Medicine Houston Texas USA
4. Division of Nephrology, Department of Medicine Michael E. DeBakey VA Medical Center Houston Texas USA
5. VA Health Services Research and Development Center for Innovations in Quality, Effectiveness and Safety Houston Texas USA
6. University of Texas Southwestern Medical Center Department of Internal Medicine, Section of Nephrology Dallas Texas USA