1Animal Disease Control Division, National Veterinary Research and Quarantine Service, Anyang 430-824, Korea.
2Biosafety Research Institute, College of Veterinary Medicine, Chonbuk National University, Jeonju 561-712, Korea.
3Biotherapy Human Resources Center, College of Veterinary Medicine, Chonnam National University, Gwangju 500-757, Korea.
4Department of Veterinary Pharmacology and Toxicology, College of Veterinary Medicine, Konkuk University, Seoul 143-701, Korea. JFIF d d Ducky d qhttp://ns.adobe.com/xap/1.0/