1. Division of Nephrology Hennepin County Medical Center University of Minnesota Medical School Minneapolis, Minnesota
2. Department of Medicine University of Missouri-Columbia Columbia, Missouri
3. Kidney Disease Program University of Louisville, Louisville, Kentucky
4. Royal Infirmary Manchester, United Kingdom
5. The Drug Evaluation Unit Hennepin County Medical Center Minneapolis, Minnesota
6. Nephrology Section Tokyo Jikei University, School of Medicine Tokyo, Japan
7. Renal Division Evangelic School of Medicine Curitiba Parana, Brazil
8. Medicine University of Toronto Toronto, Ontario, Canada
9. Diakonessen Hospital Laboratory for Medical Microbiology Utrecht, The Netherland