1. Institut für Pharmakologie und Toxikologie, Universitätsklinikum Charité, Dorotheenstrasse 94, 10117 Berlin, Germany
2. BgVV, Diedersdorfer Weg 1, 12277 Berlin, Germany
3. National Institute of Public Health and Environmental Protection (RIVM), Antonie van Leeuwenhoeklaan 9, 3720 BA Bilthoven, The Netherlands
4. Institut für Physiologie, Tierärztliche Fakultät, Ludwig-Maximilians Universität, Veterinärztstrasse 13, 80539 München, Germany
5. Bayer AG, ZF-FDM, Rheinuferstrasse 7–9, 47829 Krefeld-Uerdingen, Germany
6. Department of Avian Virology, ID-DLO, 8200 AB Lelystad, The Netherlands
7. Department of Clinical Chemistry, University of Uppsala, 75 123 Uppsala, Sweden
8. Institute of Microbiology, Johann Gutenberg University, 55122 Mainz, Germany
9. Institut de Biologie Moleculaire et Cellulaire du CNRS, 67084 Strasbourg, France
10. Intervet International BV, Wim de Korverstraat 35, 5830 AA Boxmeer, The Netherlands
11. ZEBET, BgVV, Diedersdorfer Weg 1, 12277 Berlin, Germany
12. Department of Psychiatry and Neuropsychology, Rijksuniversiteit Limburg, 6200 MD Maastricht, The Netherlands
13. FRAME, Russell & Burch House, 96–98 North Sherwood Street, Nottingham NG1 4EE, UK