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 Pharmacology and Toxicology; College of Veterinary Medicine; Konkuk University; Seoul Korea
4. Department of Infectious Diseases; College of Veterinary Medicine; Kyungpook National University; Daegu Korea
5. Viral Disease Division; Animal and Plant Quarantine Agency; Anyang Korea