1. Indiana University Health Arnett, Lafayette, Indiana, USA
2. Hypertension Kidney and Dialysis Specialists, Panama City, Florida, USA
3. Metropolitan Access Center, Colmar Manor, Maryland, USA
4. Charleston Nephrology, Hypertension, and Transplant, S Charleston, West Virginia, USA
5. Ruston Nephrology Associates, Ruston, Louisiana, USA
6. Freedman Clinic of Internal Medicine, Alexandria, Louisiana, USA
7. University of North Dakota, Fargo, North Dakota, USA
8. Michigan Kidney Consultants in Pontiac, MI, USA
9. Nephrology and Hypertension Associates, Bluefield, West Virginia, USA