1. Royal Veterinary College, London, United Kingdom
2. National Animal Disease Center, USDA-ARS, Ames, Iowa, USA
3. Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
4. Department of Emergency Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
5. Department of Emergency Medicine of Chang Gung Memorial Hospital at Keelung, Keelung City, Taiwan
6. OIE/FAO International Reference Laboratory for Avian Influenza, Swine Influenza and Newcastle Disease, Animal and Plant Health Agency (APHA), Weybridge, Addlestone, Surrey, United Kingdom