1. Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
2. School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
3. Imperial College, London, United Kingdom
4. WHO Collaborating Centre for Reference and Research on Influenza, VIDRL, Doherty Institute, Melbourne, Australia
5. State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
6. Department of Viroscience, Erasmus MC, Rotterdam, The Netherlands
7. University of Wisconsin, Madison, Wisconsin, USA
8. University of Pittsburgh, Pittsburgh, Pennsylvania, USA
9. University of Georgia, Athens, Georgia, USA
10. Department of Infectious Diseases, St. Jude Children’s Research Hospital, Memphis, Tennessee, USA
11. Department of Microbiology and Immunology, University of Melbourne, Doherty Institute, Melbourne, Australia
12. Pennsylvania State University, University Park, Pennsylvania, USA