1. Division of Biostatistics, Department of Public Health Sciences, University of California, Davis, California.
2. Division of Nephrology, Department of Internal Medicine, University of California, Davis, California.
3. Metabolon, Durham, North Carolina.
4. Rochester Institute of Technology, Rochester, New York.
5. Cancer Center, University of California, Davis, California.
6. Medical Service, Sacramento VA Medical Center, Sacramento, California.