1. EpiConcept; Paris France
2. National Centre for Microbiology; Instituto de Salud Carlos III; Madrid Spain
3. Sorbonne Universités; UPMC Univ Paris 06; INSERM; Institut Pierre Louis d’épidémiologie et de Santé Publique (IPLESP UMRS 1136); Paris France
4. Department for Infectious Disease Epidemiology; Robert Koch Institute; Berlin Germany
5. Department of Infectious Disease; Istituto Superiore di Sanità; Rome Italy
6. National Centre for Epidemiology; Instituto de Salud Carlos III; Madrid Spain
7. Ciber Epidemiología y Salud Pública (CIBERESP); Madrid Spain
8. National Centre for Epidemiology; Budapest Hungary
9. The Public Health Agency of Sweden; Stockholm Sweden
10. Health Service Executive - Health Protection Surveillance Centre; Dublin Ireland
11. National Institute of Public Health-National Institute of Hygiene; Warsaw Poland
12. Centre for Infectious Disease Control; National Institute for Public Health and the Environment; Bilthoven The Netherlands
13. Instituto Nacional de Saúde; Dr Ricardo Jorge; Lisbon Portugal
14. Development for Microbiology and Immunology; Cantacuzino Institute; National Institute of Research; Bucharest Romania
15. Croatian Institute of Public Health; Zagreb Croatia
16. Institut Pasteur; Paris France
17. National Reference Centre for Influenza; Robert Koch Institute; Berlin Germany
18. European Centre for Disease Prevention and Control (ECDC); Stockholm Sweden