1. Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia
2. Institute for Clinical Evaluative Sciences
3. Public Health Ontario
4. Department of Family and Community Medicine, University of Toronto
5. Dalla Lana School of Public Health, University of Toronto
6. University Health Network, Toronto, Ontario, Canada
7. School of Public Health, Curtin University, Perth
8. Wesfarmers Centre of Vaccines and Infectious Diseases, Telethon Kids Institute, Subiaco, Western Australia, Australia
9. Chief Physician’s Office, Clalit Health Services, Clalit Research Institute, Tel Aviv
10. School of Public Health, Medical School for International Health, Ben Gurion University, Bersheva, Israel
11. University of Michigan School of Public Health, Ann Arbor
12. University of Alberta
13. ProvLab Alberta, Edmonton, Canada
14. Kaiser Permanente Vaccine Study Center, Kaiser Permanente Northern California, Oakland
15. Communicable Disease Control Directorate, Department of Health Western Australia, Perth, Australia
16. Cumming School of Medicine, University of Calgary
17. Alberta Health, Edmonton, Canada
18. Abt Associates, Cambridge, Massachusetts
19. Kaiser Permanente Washington Health Research Institute, Seattle, Washington
20. School of Epidemiology and Public Health, University of Ottawa
21. Children’s Hospital of Eastern Ontario Research Institute, Ottawa, Canada
22. Department of Microbiology, QEII Medical Centre, PathWest Laboratory Medicine, Nedlands, Western Australia, Australia
23. Division of Preventive Medicine
24. School of Public Health, University of Alberta, Edmonton
25. Department of Community Health Sciences, University of Calgary, Alberta, Canada
26. Center for Health Research, Kaiser Permanente Northwest, Portland, Oregon