endocrine disruptors, and his current studies include investigations of possible adverse reproductive effects of exposures to pesticides or dioxins, phthalates, and bisphenol. He served as a member of the Institute of Medicine Committee on Gulf War and Health: Literature Review of Pesticides and Solvents.

Karl Kelsey, MD, MOH, is Professor of Community Health and Pathology and of Laboratory Medicine at Brown University. He received his MD from the University of Minnesota and a master’s degree in occupational health from Harvard University. Until 2007, he was on the faculty of the Harvard School of Public Health and Harvard Medical School. He is interested in the application of laboratory-based biomarkers in chronic-disease epidemiology and tumor biology and in characterizing individual susceptibility to cancer. He is an author of more than 200 publications and has served on the National Academies Committees on Toxicity Testing and Assessment of Environmental Agents, on Copper in Drinking Water, on the Evaluation of the Department of Veterans Affairs Uniform Case Assessment Protocol, to Review the Health Consequences of Service During the Persian Gulf War, to Conduct a Study on Curriculum Development in Environmental Medicine, and on the Health Effects of Mustard Gas and Lewisite.

Nancy I. Kerkvliet, PhD, is Professor of Environmental and Molecular Toxicology at Oregon State University in Corvallis, Oregon. Dr. Kerkvliet’s research is focused on using animal models to understand how chemicals of environmental concern alter immune function, primarily on understanding how activation of the AHR by 2,3,7,8-tetrachlorodibenzo-p-dioxin and other ligands suppresses immune responses. In 2007, Dr. Kerkvliet was the recipient of the Society of Toxicology’s Career Achievement Award in Immunotoxicology. She previously served on the Committee on Toxicology, its Subcommittee on Jet Propulsion Fuel 8, and the committees for the fifth, sixth, and seventh updates of Veterans and Agent Orange: Health Effects of Herbicides Used in Vietnam.

Stephen B. Kritchevsky, PhD, MSPH, is Professor of Internal Medicine in the Section on Gerontology and Geriatric Medicine and Director of the J. Paul Sticht Center on Aging of Wake Forest School of Medicine in Winston-Salem, North Carolina. After receiving both his M.S.P.H. and his Ph.D. degrees in epidemiology from the University at North Carolina, Chapel Hill, he joined the Department of Biostatistics and Epidemiology and later the Department of Preventive Medicine of the University of Tennessee Health Science Center. Dr. Kritchevsky’s research interests are related to nutritional factors affecting the health and function of older adults including inflammation, obesity, metabolic syndrome, and cardiovascular disease.

Peter S. J. Lees, PhD, CIH, is a professor and director of the Division of Environmental Health Engineering at the Johns Hopkins University’s Bloomberg

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