1. Harbor-UCLA Medical Center, Torrance, California, USA
2. Lundquist Research Institute, Torrance, California, USA
3. UCLA School of Medicine, Westwood, California, USA
4. Lake Side Heart and Vascular Center, Lake Havasu, Arizona, USA
5. Puerto Rico Vascular Center, Puerto Rico, USA
6. Division of Nephrology, Ochsner Medical Center, New Orleans, Louisiana, USA
7. Baton Rouge General Medical Center, Internal Medicine Program, Baton Rouge, Louisiana, USA
8. Renal Associates of Baton Rouge, Baton Rouge, Louisiana, USA