1. Division of Nephrology and Hypertension; Harold Simmons Center for Kidney Disease Research and Epidemiology; University of California Irvine; Orange California
2. Long Beach Veterans Affairs Healthcare System; Long Beach California
3. Department of Epidemiology; UCLA Fielding School of Public Health; University of California Los Angeles; Los Angeles California
4. Los Angeles Biomedical Research Institute at Harbor-UCLA; Torrance California
5. Long Beach Memorial Medical Center; Long Beach California
6. Renal Division; University of Tennessee Health Science Center; Memphis Tennessee
7. Memphis Veterans Affairs Medical Center; Memphis Tennessee