1. Epiconcept, Paris, France
2. European Centre for Disease Prevention and Control, Stockholm, Sweden
3. National Centre for Microbiology, Institute of Health Carlos III, Madrid, Spain
4. National Centre for Epidemiology, Institute of Health Carlos III, Madrid, Spain
5. Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), Madrid, Spain
6. Croatian Institute of Public Health, Zagreb, Croatia
7. Centre for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, the Netherlands
8. National Institute of Health Dr Ricardo Jorge, Lisbon, Portugal
9. Inserm, CIC Cochin-Pasteur, Paris, France
10. AP–HP, Hôpital Cochin, Paris, France
11. Faculty of Medicine, University of Paris City, Paris, France
12. Sciensano, Brussels, Belgium
13. Universitair Ziekenhuis Brussel, Brussels, Belgium
14. IDCU within Health promotion and disease prevention Directorate, G’mangia, Malta
15. Instituto de Salud Pública de Navarra-IdiSNA, Pamplona, Spain
16. St. Parascheva Clinical Hospital of Infectious Diseases, Iasi, Romania
17. Grigore T. Popa University of Medicine and Pharmacy, Iasi, Romania
18. Health Service Executive–Health Protection Surveillance Centre, Dublin, Ireland
19. Lithuanian University of Health Sciences, Kaunas, Lithuania
20. Faculty of Medicine, Masaryk University, Brno, Czechia
21. University Hospital Brno, Brno, Czechia
22. National Public Health Organisation (EODY), Athens, Greece
23. Luxembourg Institute of Health, Luxembourg
24. Robert Koch Institute, Berlin, Germany
25. Servicio de Medicina Preventiva Hospital Universitario Son Espases, Servicio de Epidemiología, Consellería de Salut, Palma, Spain
26. Teaching Public Health Institute of Split-Dalmatia County, Split, Croatia
27. Dr Victor Babes Clinical Hospital of Infectious and Tropical Diseases, Bucharest, Romania
28. Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
29. Centre Hospitalier de Luxembourg, Luxembourg
30. Servicio de Epidemiología, Dirección General de Salud Pública, Consejería de Sanidad de Galicia, Santiago de Compostela, A Coruna, Spain
31. Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, the Netherlands
32. “Cantacuzino” National Military Medical Institute for Research-Development, Bucharest, Romania