1. Harold Simmons Center for Kidney Disease Research and Epidemiology, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, California
2. Division of Nephrology and Hypertension, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, California
3. Department of Epidemiology, UCLA School of Public Health, Los Angeles, California
4. DaVita, Inc., El Segundo, California
5. Division of Cardiology, Dorrance Hamilton Research Laboratories, Thomas Jefferson University, Philadelphia, Pennsylvania
6. Center for Novel Therapies for Kidney Disease, Dorrance Hamilton Research Laboratories, Thomas Jefferson University, Philadelphia, Pennsylvania