1. Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
2. Division of Environmental Health Sciences, University of California Berkeley, School of Public Health, Berkeley, California, USA
3. Department of Environmental Health, School of Public Health, Boston University, Boston, Massachusetts, USA
4. Getting to Know Cancer (NGO), Truro, Nova Scotia, Canada
5. Department of Surgery, California Pacific Medical Center Research Institute, San Francisco, California, USA
6. Department of Environmental Toxicology, University of California Davis, Davis, California, USA
7. Office of Research & Development, Center for Public Health and Environmental Assessment, U.S. Environmental Protection Agency, Cincinnati, Ohio, USA
8. Office of the Director, Office of Environmental Health and Hazard Assessment, California Environmental Protection Agency, Sacramento, California, USA