1. ECVAM, Institute for Health & Consumer Protection, European Commission Joint Research Centre, Ispra (VA), Italy
2. FRAME, Nottingham, UK
3. Research and Development Department, Bio-Products Laboratory, Elstree, Herts., UK
4. Department of Physiology, Innsbruck Medical University, 6010 Innsbruck, Austria
5. ATCC, Manassas, VA, USA
6. Généthon, Evry, France
7. National Center for Toxicological Research, Food and Drug Administration, Rockville, MD, USA
8. Division of Cell Biology and UK Stem Cell Bank, National Institute for Biological Standards and Control, Blanche Lane, Potters Bar, Herts., UK
9. National Toxicology Program Interagency Center for the Evaluation of Alternative Toxicological Methods Environmental Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, USA