1. Department of Pathology School of Public Health Li Ka Shing Faculty of Medicine The University of Hong Kong Pokfulam Hong Kong SAR China
2. Centre of Influenza Research School of Public Health Li Ka Shing Faculty of Medicine The University of Hong Kong Pokfulam Hong Kong SAR China
3. Division of Molecular Biosciences Faculty of Natural Sciences Imperial College London London UK
4. Faculty of Veterinary Medicine Lab of Virology Salisburylaan 133 Merelbeke Belgium