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Dr. Thomas became Vice President for Corporate Research at Baxter Healthcare. Dr. Thomas served as vice president at the University of Texas Health Science Center at San Antonio from 1988 to 1998. He serves on several editorial boards of biomedical journals and serves as chairman of the Society of Toxicology Education Committee, chairman of the Expert Advisory Committee of the Canadian Network of Toxicology Centers, and vice president of the Academy of Toxicology. He is a diplomate, fellow, and member of the Board of Trustees in the Academy of Toxicological Sciences, and serves on many scientific boards and committees in the chemical and the pharmaceutical industry. He has received many awards, including the 1999 Distinguished Service Award from the American College of Toxicology, the Merit Award from the Society of Toxicology, Certificate of Scientific Service (U.S. Environmental Protection Agency), Distinguished Lecturer in Medical Sciences (American Medical Association), and the Distinguished Service Award from the Texas Society for Biomedical Research. He is an elected foreign member of the Russian Academy of Medical Sciences. Dr. Thomas is the author of over a dozen textbooks and research monographs and has published over 350 scientific articles.

JUDITH R. TURNLUND, Ph.D, R.D., is a research nutrition scientist at the U.S. Department of Agriculture Western Human Nutrition Research Center and an adjunct professor in the Department of Nutrition, University of California at Davis. She earned her B.S. at Gustavus Adolphus College and holds a Ph.D. from the University of California at Berkeley. Her research interests include human requirements for and bioavailability of trace elements (zinc, copper, molybdenum, and iron) and nutrition and aging. Dr. Turnlund received the American Institute of Nutrition Lederle Award for outstanding accomplishments in human nutrition.

KEITH P. WEST, Dr.P.H., R.D., is professor of human nutrition at the Johns Hopkins School of Hygiene and Public Health. He received his B.S. from Drexel University, earned his Dr.P.H. from the Johns Hopkins School of Hygiene and Public Health, and holds an R.D. from Walter Reed General Hospital. Dr. West recently headed two large community trials in Nepal to understand the impact of vitamin A interventions on the prevention of morbidity and mortality in women, children, and infants. In addition to vitamin A, Dr. West’s research interests include nutritional epidemiology and dietary and anthropometric assessment. Dr. West is a member of the International Vitamin A Consultative Group.

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