1. Department of Medical Pathology and Laboratory Medicine School of Medicine University of California, Davis Davis, CA 95616
2. School of Public Health Department of Epidemiology 611 Church Street, Room 315 University of Michigan Ann Arbor, MI 48104
3. Department of Medical Pathology and Laboratory Medicine School of Medicine University of California, Davis Davis, CA
4. US Department of Agriculture Agricultural Research Service Western Human Nutrition Research Center University of California, Davis Davis, CA