1. Harold Simmons Center for Kidney Disease Research and Epidemiology, Division of Nephrology and Hypertension, University of California Irvine Medical Center, Orange, CA, USA
2. VA Long Beach Healthcare System, Long Beach, CA, USA
3. Los Angeles Biomedical Research Institute, Harbor-UCLA Med. Center, Torrance, CA, USA
4. Department of Epidemiology, UCLA Fielding School of Public Health, Los Angeles, CA, USA
5. Division of Nephrology, University of Tennessee Health Science Center, Memphis, TN, USA
6. Nephrology Section, Memphis Veterans Affairs Medical Center, Memphis, TN, USA
7. University of California Irvine Program for Public Health, Irvine, CA, USA
8. General Internal Medicine, University of California Irvine Medical Center, Orange, CA, USA
9. Biostatistics, Epidemiology and Research Design, University of California Irvine, Irvine, CA, USA
10. Kaiser Permanente of Southern California, Pasadena, CA, USA