1. Department of Infectious Diseases, College of Veterinary Medicine, Konkuk University, Seoul, Korea.
2. Department of Public Health, College of Veterinary Medicine, Konkuk University, Seoul, Korea.
3. Department of Biomedical Science and Technology, SMART Institute of Advanced Biomedical Science, Konkuk University, Seoul, Korea.
4. Veterinary Science Research Institute, College of Veterinary Medicine, Konkuk University, Seoul, Korea.