1. Laboratory of Large Animal Medicine, College of Veterinary Medicine & Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Korea.
2. Animal Disease Diagnostic Division, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea.
3. Department of Veterinary Clinical Pathology, College of Veterinary Medicine & Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Korea.