1. Department of Medicine, Division of Nephrology, University of Rochester School of Medicine, Rochester, NY, USA
2. Department of Medicine, Division of Nephrology, Stanford University, Stanford, CA, USA
3. Clinical Development, Amgen Inc., Thousand Oaks, CA, USA
4. Biostatistics, Amgen Inc., Thousand Oaks, CA, USA
5. Department of Medicine, Division of Nephrology, Lehigh Valley Hospital, Allentown, PA, USA
6. Department of Internal Medicine, Division of Nephrology, Saint Louis University School of Medicine, St Louis, MO, USA
7. Department of Medicine, Division of Nephrology, University of California, Los Angeles, Los Angeles, CA, USA
8. Department of Nephrology and Dialysis, Ramsay-Générale de Santé, Clinique du Landy, Saint Ouen, France and Necker Hospital, University of Paris Descartes, Paris, France
9. Department of Nephrology and Amsterdam Cardiovascular Sciences, VU University Medical Center, Amsterdam, The Netherlands
10. Denver Nephrology, Denver, CO, USA