1. Renal-Electrolyte and Hypertension Division, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
2. Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, Pennsylvania
3. Center for Health Equity Research and Promotion, Corporal Michael J. Crescenz VA Medical Center, Philadelphia, Pennsylvania
4. Nephrology Division, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts
5. Harvard Medical School, Boston, Massachusetts
6. Office of the Chief Medical Officer, Brigham and Women's Hospital, Boston, Massachusetts