1. Division of Epidemiology and Public Health; University of Nottingham; Nottingham; United Kingdom
2. Global Influenza Programme; World Health Organization; Geneva; Switzerland
3. Department of Public Health Medicine; University of Bielefeld; Bielefeld; Germany
4. Public Health Directorate; NHS Blackpool; Blackpool; United Kingdom
5. Division of Primary Care; University of Nottingham; Nottingham; United Kingdom
6. Freelance; World Health Organization; Geneva; Switzerland
7. South West (North) Health Protection Unit; Health Protection Agency; Gloucester; United Kingdom
8. Cumbria and Lancashire Health Protection Unit; Health Protection Agency; Chorley; United Kingdom
9. Health Protection Agency Yorkshire and Humber; Health Protection Agency; Leeds; United Kingdom
10. Public Health Directorate; NHS Leicestershire County; Leicester; United Kingdom
11. Department of Medicine; Brighton and Sussex University Hospital NHS Trust; Brighton; United Kingdom
12. Law School; Harvard University; Cambridge; Massachusetts; United States of America
13. Hampshire and Isle Of Wight Health Protection Unit; Health Protection Agency; Fareham; United Kingdom
14. Public Health Directorate; NHS Nottingham City; Nottingham; United Kingdom
15. Public Health; Wessex Deanery; Winchester; United Kingdom
16. Public Health Directorate; NHS Derbyshire County; Chesterfield; United Kingdom
17. Public Health; Mersey Deanery; Liverpool; United Kingdom
18. Medical School; Harvard University; Boston; Massachusetts; United States of America
19. Public Health Directorate; Solihull NHS Primary Care Trust; Solihull; United Kingdom
20. School of Public Health; Imperial College London; London; United Kingdom
21. Childrens Services; Leicester Partnership Trust; Leicester; United Kingdom
22. Health Protection Agency East Midlands; Health Protection Agency; Nottingham; United Kingdom
23. Medical School; Lancaster University; Lancaster; United Kingdom
24. Department of Infection and Population Health; University College London; London; United Kingdom
25. Centre for International Health and Development; University College London; London; United Kingdom
26. Public Health Directorate; NHS Northamptonshire; Northampton; United Kingdom
27. Public Health Directorate; NHS Halton and St. Helens; Widnes; United Kingdom
28. Public Health Directorate; NHS Nottinghamshire County; Mansfield; United Kingdom
29. Public Health Directorate; NHS East Lancashire; Nelson; United Kingdom
30. Health Protection Agency North East; Health Protection Agency; Newcastle upon Tyne; United Kingdom
31. Faculty of Medicine; Tokyo Medical and Dental University; Tokyo; Japan