1. Center for Biologics Evaluation and Research, US Food and Drug Administration, Silver Spring, Maryland, USA
2. Defense Health Agency- Immunization Healthcare Division, Falls Church, Virginia, USA
3. Walter Reed National Military Medical Center, Bethesda, Maryland, USA
4. Infectious Diseases Clinical Research Program, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
5. Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, Maryland, USA
6. Madigan Army Medical Center, Fort Lewis, Washington, USA
7. Defense Health Agency- Immunization Healthcare Division Regional Office, Lackland AFB, Texas, USA
8. Naval Medical Center, Portsmouth, Virginia
9. Brooke Army Medical Center, Fort Sam Houston, Texas, USA
10. Division of Infectious Diseases, Naval Medical Center, San Diego, California, USA
11. Defense Health Agency- Immunization Healthcare Division Regional Office, Ft. Bragg, North Carolina, USA
12. Influenza Division, Centers for Disease Control and Prevention, Atlanta Georgia, USA