1. Department of Infectious Diseases, St Jude Children’s Research Hospital, Memphis, Tennessee
2. Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea
3. Joint Influenza Research Centre, Shantou University Medical College, Shantou
4. State Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People’s Hospital, Shenzhen
5. State Key Laboratory of Emerging Infectious Diseases
6. Centre of Influenza Research, School of Public Health, The University of Hong Kong, Hong Kong Special Administrative Region, People’s Republic of China