1. Center for Infectious Disease Control, Bilthoven, the Netherlands
2. European Centre for Disease Prevention and Control, Stockholm, Sweden
3. Food and Consumer Product Safety Authority, Zutphen, the Netherlands
4. Health Protection Agency, London, England
5. Statens Serum Institut, Copenhagen, Denmark
6. Institut Français pour la Recherche et l'Exploitation de la Mer, Nantes, France
7. Public Health Laboratory Centre, Hong Kong Special Administrative Region, People’s Republic of China
8. University of Helsinki, Helsinki, Finland
9. Norwegian Institute of Public Health, Oslo, Norway
10. Institute of Medical and Veterinary Science, Adelaide, South Australia, Australia
11. Baranya County Institute of State Public Health Service, Pécs, Hungary
12. Robert Koch Institute, Berlin, Germany
13. Instituto de Salud Carlos III, Madrid, Spain