1. National Institute of Public Health and the Environment (RIVM), P.O. Box 1, 3720 BA Bilthoven, The Netherlands;
2. Inspectorate for Health Protection, Commodities and Veterinary Public Health, De Stoven 22, 7206 AX Zutphen, The Netherlands;
3. Stallergenes SA, 6 Rue Alexis de Tocqueville, 92183 Antony Cedex Paris, France;
4. Centre D'Economie Rurale, Rue du Point du Jour 8, 6900 Marloie, Belgium;
5. Department of Biochemistry, Swiss Federal Institute of Technology, 8092 Zurich, Switzerland;
6. ECVAM, JRC Environment Institute, 21020 Ispra (VA), Italy;
7. Department of Microbiology and Immunology (M/C 790), University of Illinois, 835 S. Wolcott, Chicago, IL 60612, USA;
8. Paul-Ehrlich-Institut, Bundesamt für Sera und Impfstoffe, Paul-Ehrlich-Strasse 51–59, 63225 Langen, Germany;
9. Department of Comparative Medicine, Biomedical Centre, Box 570, 75123 Uppsala, Sweden;
10. Superfos Biosector a/s, Elsenbakken 23, 3600 Frederikssund, Denmark;
11. Deutsches Krebsforschungszentrum, Im Neuenheimer Feld 280, 69120 Heidelberg, Germany;
12. Instituto de Salud Carlos III, Unidad Respuesta Immune, Centro Nacional de Biol. Fundamental, 28220 Madrid, Spain;
13. Division of Infection and Immunity, Institute of Biomedical and Life Sciences, Joseph Black Building, Glasgow G12 8QQ, UK