1. MetroHealth Medical Center (G.S.), Cleveland, Ohio 44109
2. Renal Division (G.S.), Washington University School of Medicine, St. Louis, Missouri 63110
3. Department of Medicine (A.S.B.), Division of Nephrology, Columbia University College of Physicians and Surgeons, New York, New York 10032
4. Department of Endocrinology (S.I.M.), State University of New York-Downstate Brooklyn, Brooklyn, New York 11203
5. Kidney Early Evaluation Program Data Coordinating Center (S.L., S.C.C.), Minneapolis Medical Research Foundation, Minneapolis, Minnesota 55404
6. St. John Providence Health System (P.A.M.), Warren, Michigan 48092
7. Providence Hospitals and Medical Centers (P.A.M.), Southfield, Michigan 48075
8. Providence Park Heart Institute (P.A.M.), Novi, Michigan 48374
9. University of Missouri-Columbia School of Medicine (A.W.C.), Columbia, Missouri 65211
10. Harry S. Truman Veterans Affairs Hospital (A.W.C.), Columbia, Missouri 65201