1. Kyushu Research Station; National Institute of Animal Health; NARO; Kagoshima Japan
2. Division of Viral Disease and Epidemiology; National Institute of Animal Health; NARO; Ibaraki Japan
3. Eastern Center for Livestock Hygiene Service; Hiroshima Japan
4. Western Center for Livestock Hygiene Service; Hiroshima Japan
5. Miyazaki Livestock Hygiene Service Center; Miyazaki Japan
6. Kagoshima Central Livestock Hygiene Service Center; Kagoshima Japan
7. Exotic Disease Research Station; National Institute of Animal Health; NARO; Tokyo Japan