1. Harold Simmons Center for Kidney Disease Research and Epidemiology, University of California–Irvine, Orange, California
2. Division of Nephrology, Brigham and Women's Hospital, Boston, Massachusetts, USA
3. Division of Nephrology and Hypertension, University of California–Irvine, Irvine, California, USA
4. Department of Medicine, Division of Nephrology, University Health Network, University of Toronto, Toronto, Ontario, Canada
5. Division of Nephrology, Memphis Veterans Affairs Medical Center, and Division of Nephrology, University of Tennessee Health Science Center, Memphis, Tennessee, USA
6. University of Tennessee Health Science Center, Memphis, Tennessee, USA
7. Harborview Medical Center, University of Washington, Seattle, Washington, USA
8. Department of Epidemiology, UCLA School of Public Health, Los Angeles, California, USA