1. Korea Zoonosis Research Institute, Chonbuk National University, Iksan, South Korea.
2. Department of Internal Medicine, College of Medicine, Kangwon National University, Chuncheon, South Korea.
3. Department of Veterinary Medicine, Chonbuk National University, Iksan, South Korea.
4. Center for Immunology & Pathology, Korea National Institute of Health, Cheongju, South Korea.
5. Department of Veterinary Medicine, Kangwon National University, Chuncheon, South Korea.
6. Institute of Veterinary Medical Science, Kangwon National University, Chuncheon, South Korea.