Deepak K. Bhalla is professor of toxicology in the Department of Occupational and Environmental Health Sciences at Wayne State University. He received his PhD from Howard University. His research is focused in air pollution, pulmonary toxicology, and immunotoxicology. He is chair of Wayne State University’s Research Committee and has served on several National Institute of Environmental Health Sciences (NIEHS) and Environmental Protection Agency panels. He is on the editorial boards of the Journal of Toxicology and Environmental Health and Inhalation Toxicology. He has served on study sections of the National Institutes of Health and NIEHS and was a member of the American Society for Cell Biology’s Congressional Liaison Committee.

David Gaylor is an adjunct professor of statistics at the University of Arkansas for Medical Sciences. He received his PhD from North Carolina State University in statistics. He is the recipient of the Shewell Award and the Frank Wilcoxon Prize from the American Society for Quality Control and of the Distinguished Achievement Medal from the Statistics and Environment Section of the American Statistical Association. He is a fellow of the American Statistical Society and the Society for Risk Analysis. He was a member of the National Research Council Committee on Toxicology and served on several of its subcommittees.

Robert A. Goyer is a clinical pathologist and an internationally recognized expert in health effects of toxic and nutritionally essential metals. He is professor emeritus at the University of Western Ontario. His research interests are experimental pathology, toxicology of heavy metals and metal interactions, and nephrotoxicity. He received his MD from St. Louis University. Dr. Goyer has published extensively on the toxicity of cadmium, lead, and arsenic and on risks associated with essential elements. He was chair of the National Research Council Subcommittee on Arsenic in Drinking Water and Committee on the Toxicological Effects of Methylmercury.

Sidney Green is professor of pharmacology at Howard University, where he received his PhD in pharmacology. Previously, he was director of the Department of Toxicology at Covance Laboratories and director of the Division of Toxicological Research at the U.S. Food and Drug Administration in the Center for Food Safety and Applied Nutrition. He was also director of the Toxic Effects Branch in the Office of Toxic Substances at the Environmental Protection Agency. Dr. Green has expertise in genetic toxicology and systemic toxicology. He is a former member of the National Research Council Committee on Toxicology and Subcommittee on Smokes and Obscurants. He is a past president of the American College of Toxicology.

Kathryn A. Higley is an associate professor in the Department of Nuclear Engineering at Oregon State University in Corvallis. She earned her MS and PhD in radiologic health sciences from Colorado State University. Her fields of interest include environmental transport and fate of radionuclides, radiochemistry,