1. GlaxoSmithKline, King of Prussia, Pennsylvania, USA
2. National Toxicology Program (NTP), National Institute of Environmental Health Sciences (NIEHS), Research Triangle Park, North Carolina, USA
3. Center for Food Safety and Applied Nutrition (CFSAN), U.S. Food and Drug Administration, College Park, Maryland, USA
4. Merck Research Laboratories, Riom, France
5. Pfizer Inc., Groton, Connecticut, USA
6. NIEHS, Research Triangle Park, North Carolina, USA
7. Charles River, Frederick, Maryland, USA
8. Bayer Schering Pharma AG, Wuppertal, Germany
9. Huntingdon Life Sciences, Eye, United Kingdom
10. U.S. Environmental Protection Agency, Research Triangle Park, North Carolina, USA