research fellowship in molecular teratology at the National Institute of Child Health and Human Development.

R. MICHAEL MCCLAIN is a consultant in toxicology with McClain Associates and adjunct professor in the Environmental and Occupational Health Sciences Institute at the University of Medicine and Dentistry of New Jersey. Previously, he was distinguished research leader with Hoffmann-LaRoche, Inc. Dr. McClain is a diplomate of the American Board of Toxicology, a fellow of the Academy of Toxicological Sciences, and past president of the Society for Toxicology. He is experienced in teratology, reproductive toxicology, general toxicology, and carcinogenicity testing. His research activities include the mechanisms of chemical carcinogenesis in the thyroid, liver, and adrenals and the regulatory aspects of cancer risk assessment. He reviewed scientific studies on perchlorate for private clients and provided comments to the Environmental Protection Agency Peer Review Panel on Perchlorate in February 1999. Dr. McClain received his PhD in pharmacology from the University of Iowa.

SUSAN SCHANTZ is professor of toxicology at the University of Illinois at Urbana-Champaign. She is director of a Children’s Environmental Health Research Center and a National Institute of Environmental Health Sciences (NIEHS) Environmental Toxicology Training Program. The center is supported by competitively awarded grants from NIEHS and the Environmental Protection Agency. She also chairs the Interdisciplinary Environmental Toxicology Program at the university. Dr. Schantz’s research interests include the effects of exposure to environmental neurotoxicants during development and aging—particularly the nervous system effects of polychlorinated biphenyls, dioxins, and related compounds—and modeling human exposures to identify which chemicals mediate neuropsychologic effects. Dr. Schantz earned her PhD in environmental toxicology from the University of Wisconsin, Madison.

DALENE STANGL is director of the Institute of Statistics and Decision Sciences and professor of the practice of statistics and public policy at Duke University. Her research interests include analyzing and promoting a stronger link between statistical analysis and decision-making and promoting Bayesian statistical methods in health-related research. She is a fellow of the American Statistical Association. Dr. Stangl has coedited two books: Bayesian Biostatistics (Marcel Dekker, 1996) and Meta-Analysis in Medicine and Health Policy (Marcel Dekker, 2000). She earned her PhD in statistics from Carnegie Mellon University.

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