1. Laboratory of Avian Diseases, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea.
2. BK21 Plus Program for Veterinary Science and Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea.
3. Rsearch Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea.
4. Animal and Plant Quarantine Agency, Gimcheon 39660, Korea.
5. Laboratory of Poultry Medicine, Department of Farm Animal Medicine, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea.
6. Farm Animal Clinical Training and Research Center (FACTRC), GBST, Seoul National University, Pyeongchang 25354, Korea.