1. National Institute of Animal Health, National Agriculture and Food Research Organization (NARO), 3-1-5 Kannondai, Tsukuba, Ibaraki 305-0856, Japan
2. Tokushima Animal Hygiene Service Center of Tokushima Prefecture, 5-94, Minamisyoumachi, Tokushima, 770-0045, Japan
3. Chuo Livestock Hygiene Service Center, Nagasaki Prefecture, 3118 Kaizu, Isahaya, Nagasaki 854-0063, Japan
4. Seibu Livestock Hygiene Service Center, 1540-17 Kanayadani, Hoki-cho, Saihakugun, Tottori 689-4213, Japan