1. WHO Collaborating Center for Studies on the Ecology of Influenza in Animals, Department of Infectious Diseases, St. Jude Children’s Research Hospital, Memphis, Tennessee, USA
2. WHO Collaborating Centre for Reference and Research on Influenza, Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
3. WHO Collaborating Centre for Reference and Research on Influenza, Division of Virology, MRC National Institute for Medical Research, Mill Hill, London, United Kingdom
4. WHO Collaborating Center for Reference and Research on Influenza, Chinese National Influenza Center, National Institute for Viral Disease Control and Prevention China CDC, Beijing, People’s Republic of China
5. WHO Collaborating Centre for Reference and Research on Influenza, National Institute of Infectious Diseases, Laboratory of Influenza Virus Surveillance, Influenza Virus Research Center, Tokyo, Japan
6. Division of Viral Products, Office of Vaccines Research and Review, Center for Biologics Evaluation and Research, Food and Drug Administration, Rockville, Maryland, USA
7. Immunology and Vaccines, Therapeutic Goods Administration Laboratories, Woden, ACT, Australia
8. National Institute for Biological Standards and Control, Medicines and Healthcare Products Regulatory Agency, Potters Bar, United Kingdom
9. Center for Pathogen Evolution, Department of Zoology, WHO CC for Modeling Evolution and Control of Emerging Infectious Diseases, University of Cambridge, Cambridge, United Kingdom
10. OIE Scientific and Technical Department, OIE, Paris, France
11. OFFLU/EMPRES Laboratory Unit, Animal Health Service, FAO, Rome, Italy