Toxicology (SOT) and is past president of the Reproductive Toxicology Specialty Section of the national organization and of the North Carolina and South Carolina Regional Chapters of the SOT. He was editor of Fundamental and Applied Toxicology from 1986-1992, and serves on the Editorial Advisory Board of Environmental Health Perspectives and Critical Reviews in Toxicology. Dr. Schwetz was elected to the Institute of Medicine in 1998.

Thomas M. Yuill, Ph.D., is Emeritus Director of Gaylord Nelson Institute for Environmental Studies at the University of Wisconsin. He received his B.S. (1959) in wildlife management from Utah State University, and M.S. (1962) and Ph.D. (1964) in wildlife ecology and veterinary science (virology) from the University of Wisconsin. Yuill is also a professor emeritus in the Department of Animal Health and Biomedical Sciences and Department of Wildlife Ecology at the University of Wisconsin. He has expertise in virus ecology, arthropod-borne virology, animal ecology, and the environmental effects on epizootiology of animal diseases (emphasis on wildlife). Yuill is past president of the Organization for Tropical Studies and of the Wildlife Disease Association, and past Director for the Center for Livestock in International Development. He is a consultant to the National Institutes of Health (and past chair, U.S.- Japan Panel on Viral Diseases), Environmental Protection Agency, and U.S. Agency for International Development, and has served on the Board of Directors of the Tropical Agricultural Center for Research and Instruction (CATIE), headquartered in Costa Rica. He previously served on the National Research Council Panel on Microlivestock.

Stephen L. Zawistowski, Ph.D., is Senior Vice President and Science Advisor of The American Society for the Prevention of Cruelty to Animals. He has worked extensively in animal behavior and welfare. He joined The ASPCA in 1988 as vice president of education, after an academic career that included the University of Illinois, Indiana University, and St. John's University in New York. Zawistowski received his Ph.D. in 1983 and A.M. in 1979 from the University of Illinois in psychology and genetics. Zawistowski is on the Board of Directors for the National Council on Pet Population Study and Policy and is the Chairman of the Animal Behavior Society's Board of Professional Certification. He is a Certified Applied Animal Behaviorist, a Certified Technical Animal Rescue Specialist, and founding co-editor of the Journal of Applied Animal Welfare Science.

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