David L. Eaton is professor of environmental health and associate dean of research at the School of Public Health and Community Medicine and director of the Center for Ecogenetics and Environmental Health at the University of Washington. He received a PhD in pharmacology from the University of Kansas Medical Center. Dr. Eaton’s research interests include the molecular basis of environmental causes of cancer and how human genetic differences in biotransformation enzymes may increase or decrease individual susceptibility to chemicals found in the environment. He has served on numerous boards and committees; he was on the Board of Directors and was treasurer of the American Board of Toxicology (1990-1994) and was recently the president of the Society of Toxicology. He is an elected fellow of the American Association for the Advancement of Science and the Academy of Toxicological Sciences. Dr. Eaton has also served on the National Research Council Board of Environmental Studies and Toxicology and the Subcommittee to Update the 1999 Arsenic Report.