1Department of Laboratory Animal Medicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul 151-742, Korea.
2SNBL USA, Ltd., 6605 Merrill Creek Parkway, Everett, Washington, USA.
3Environmental Resources Research Department, National Institute of Environmental Research, Incheon, Korea.
4Department of Veterinary Parasitology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul 151-742, Korea.
5Department of Ecological Conservation Research, National Institute of Ecology, Seocheon, Korea. JFIF d d Ducky d qhttp://ns.adobe.com/xap/1.0/