1. Animal Disease Diagnostic Division, Animal, Plant and Fisheries Quarantine and Inspection Agency, Anyang 430-757, Korea.
2. Namwon-Branch, Jeonbuk Institute of Livestock and Veterinary Research, Namwon 590-230, Korea.
3. Southern Branch, Gyeongnam Institute of Livestock and Veterinary Research, Tongyeong 650-817, Korea.
4. Southern Branch, Jeollanamdo Institute of Livestock and Veterinary Science, Gangjin 590-230, Korea.