1. College of Veterinary Medicine, Konkuk University, Seoul, Republic of Korea
2. WOAH/FAO International Reference Laboratory for Avian Influenza National Veterinary Services Laboratories, Animal and Plant Health Inspection Service, US Department of Agriculture, Ames, IA, USA
3. WOAH/FAO International Reference Laboratory for Avian Influenza Animal and Plant Health Agency, Surrey, UK
4. WOAH Collaborating Centre for Research on Emerging Avian Diseases and FAO International Reference Laboratory for Avian Influenza, U.S. National Poultry Research Center, Agricultural Research Service, U.S. Department of Agriculture, Athens, GA, USA