1. Influenza and Avian Virology Team, Department of Virology, Animal and Plant Health Agency (APHA-Weybridge), Addlestone, UK
2. Mammalian Virology Investigation Unit, Department of Virology, Animal and Plant Health Agency (APHA-Weybridge), Addlestone, UK
3. Knowsley Safari, Prescot, UK
4. Department of Pathology and Animal Sciences, Animal and Plant Health Agency (APHA-Weybridge), Addlestone, UK
5. APHA Field Epidemiology Team, APHA Bridgwater, Rivers House, East Quay, Bridgwater, UK
6. APHA Field Epidemiology Team, APHA Hornbeam House, Electra Way, Crewe, Cheshire, UK
7. Worldwide Influenza Centre, The Francis Crick Institute, London, UK
8. WOAH/FAO International Reference Laboratory for Avian Influenza, Animal and Plant Health Agency (APHA-Weybridge), Addlestone, UK