1. Animal, Plant and Fisheries Quarantine and Inspection Agency, Anyang, Gyeonggi-do, 430-824, South Korea
2. ChoongAng Vaccine Laboratories, Daejon, 305-348, South Korea
3. Catholic University of Pusan, Busan, 609-757, South Korea
4. Seoul Metropolitan Government Research Institute of Public Health and Environment, Gwacheon, Gyeonggi-do, 427-070, South Korea