1. Statens Serum Institut, Copenhagen, Denmark
2. Scientific Institute of Public Health, Brussels, Belgium
3. National Institute for Health Development, Tallinn, Estonia
4. National Institute for Health and Welfare, Helsinki, Finland
5. French Public Health Agency (Santé Publique France), Saint-Maurice, France
6. Hellenic Centre for Disease Control and Prevention, Athens, Greece
7. National Public Health Center, Budapest, Hungary
8. Health Service Executive - Health Protection Surveillance Centre, Dublin, Ireland
9. Dipartimento Epidemiologia del S.S.R., Lazio – ASL Roma 1, Rome, Italy
10. Ministero della Salute, Rome, Italy
11. Ministry of Health, Pieta, Malta
12. National Institute of Public Health and the Environment (RIVM), The Netherlands
13. Norwegian Institute of Public Health, Oslo, Norway
14. Instituto Nacional de Saúde Doutor Ricardo Jorge, Lisbon, Portugal
15. CIBER Epidemiología y Salud Pública (CIBERESP) Instituto de Salud Carlos III, Madrid, Spain
16. The Public Health Agency of Sweden, Stockholm, Sweden
17. Federal Statistical Office, Neuchâtel, Switzerland
18. Public Health England, Colindale, United Kingdom
19. Health Protection Scotland, Glasgow, United Kingdom
20. WHO Regional Office for Europe, Copenhagen, Denmark
21. European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden