1. Kidney Research Institute, Division of Nephrology, Department of Medicine, University of Washington School of Medicine, Seattle, Washington (R.M.)
2. The Rogosin Institute, New York, New York (D.C.)
3. School of Nursing, University of Washington, Seattle, Washington (S.M.M.)
4. Center for Biomedical Statistics, University of Washington School of Public Health, Seattle, Washington (T.R., P.J.H.)
5. Division of Nephrology, Department of Medicine, University of New Mexico, Albuquerque, New Mexico (M.-E.R., M.U.).