policy in OPP, particularly those related to implementation of the 1996 Food Quality Protection Act. Her responsibilities included many newly developed or updated human health risk assessment methodologies, the Endocrine Disrupter Screening Program, OPP’s implementation of the agency peer-review policy, research planning, and preparation of agency staff for presentations before the Federal Insecticide, Fungicide, and Rodenticide Act Scientific Advisory Panel and the EPA Science Advisory Board. At EPA, she also served as special assistant to the assistant administrator for the Office of Prevention, Pesticides, and Toxic Substances; deputy director of the Office of Pesticide Programs; and director of the Health and Environmental Review Division of the Office of Pollution Prevention and Toxics. Dr. Fenner-Crisp has been involved in many international activities including serving as an expert on a number of World Health Organization (WHO) International Programme on Chemical Safety working groups charged with drafting environmental health criteria documents; on the WHO Expert Panel for the Joint Meeting on Pesticide Residues; as the lead U.S. delegate to the Organization for Economic Co-operation and Development’s Endocrine Disrupter Testing and Assessment workgroup; and as lead U.S. delegate to the Expert Consultation on Acute Toxicity.

R. William Field, Ph.D., M.S., is an associate professor in the Department of Occupational and Environmental Health with a joint appointment in the Department of Epidemiology in the College of Public Health at the University of Iowa. He is also the director of the Occupational Epidemiology Training Program at the Heartland Center for Occupational Health and Safety, funded by the National Institute for Occupational Safety and Health (NIOSH), and co-director of the pulmonary outcomes core of the Environmental Health Sciences Research Center, funded by the National Institute of Environmental Health Science, both at the University of Iowa. He currently chairs a WHO working group tasked with recommending radon measurement and mitigation strategies for member countries and serves on several other radon-related WHO working groups. Dr. Field has been active in numerous national and international collaborative radiation-related epidemiolgic projects for many years and has served on the editorial boards of several national and international scientific journals. Dr. Field received his Ph.D. in preventive medicine and environmental health from the University of Iowa in 1994. His research interests fall into the broad categories of environmental epidemiology, occupational epidemiology, radioepidemiology, cancer epidemiology, immune-mediated disease epidemiology, health physics, biomonitoring, risk perception, and novel methods of retrospective exposure assessment.

Sharon M. Friedman, M.A., B.A., is professor of journalism and communication and director of the science and environmental writing program at Lehigh University in Bethlehem, Pennsylvania. She received her M.A. in journalism from Pennsylvania State University in 1974, a graduate certificate in public rela-