1. Department of Population Health, College of Veterinary Medicine, University of Georgia , Athens, Georgia, USA
2. Center for Pathogen Evolution, University of Cambridge , Cambridge, United Kingdom
3. European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Wellcome Genome Campus , Hinxton, United Kingdom
4. Animal and Plant Health Agency (APHA) , Weybridge, United Kingdom
5. World Influenza Centre, The Francis Crick Institute , London, United Kingdom