1. Harold Simmons Center for Kidney Disease Research and Epidemiology; Division of Nephrology and Hypertension; University of California Irvine Medical Center; Orange California
2. Division of Nephrology; University of New Mexico; Albuquerque New Mexico
3. Division of Nephrology; Huashan Hospital; Shanghai Medical College; Fudan University; Shanghai China
4. Division of Nephrology; Memphis Veterans Affairs Medical Center; Memphis Tennessee
5. Division of Nephrology; University of Tennessee Health Science Center; Memphis Tennessee
6. Dialysis Clinics, Inc.; Albuquerque New Mexico