1. ECVAM, JRC Environment Institute, 21020 Ispra (Va), Italy
2. CAAT, School of Hygiene and Public Health, Johns Hopkins University, 111 Market Place/Suite 840, Baltimore, MD 21202-6709, USA
3. FRAME Russell & Burch House, 96–98 North Sherwood Street, Nottingham NG1 4EE, UK
4. Town Hall, Sheringham, Norfolk NR26 8QY, UK
5. MRC Toxicology Unit, Hodgkin Building, University of Leicester, Leicester LE1 9HN, UK
6. Toxic Hazards Research Unit, ManTech Environmental Technology Inc., Dayton, OH 45431-0009, USA
7. RIVM, Antonie van Leeuwenhoeklaan 9, 3721 MA Bilthoven, The Netherlands;
8. Research Animals Department, RSPCA, The Causeway, Horsham, West Sussex RH12 1HG, UK
9. NCA, Yalelaan 17, De Uithof, 3584 CL Utrecht, The Netherlands
10. Department of Biomedical Sciences and Ethics, University of Birmingham Medical School, Birmingham B15 2TJ, UK
11. Tufts Center for Animals and Public Policy, School for Veterinary Medicine, 200 Westboro Road, North Grafton, MA 01536, USA
12. Department of Sociology, University of Reading, Whiteknights, Reading RG6 2AA, UK
13. ZEBET, BgVV, Diedersdorfer Weg 1, 12277 Berlin, Germany
14. Humane Society of the United States, 2100 L Street NW, Washington, DC 20037, USA
15. NIEHS, NTP, NIH, Research Triangle Park, NC 27709, USA
16. Division of Toxicological Sciences, School of Hygiene and Public Health, Johns Hopkins University, 615 N. Wolfe Street, Baltimore, MD 21205, USA;
17. Department of Laboratory Animal Science, Faculty of Veterinary Medicine, Utrecht University, 3508 TD Utrecht, The Netherlands