1. Joint Faculty of Veterinary Medicine, Laboratory of Animal Hygiene; Kagoshima University; Kagoshima Kagoshima 890-0065 Japan
2. Matsuoka Research Institute for Science; Tokyo 184-0003 Japan
3. Transboundary Animal Diseases Research Center, Joint Faculty of Veterinary Medicine; Kagoshima University; Kagoshima Kagoshima 890-0065 Japan
4. United Graduate School of Veterinary Science; Yamaguchi University; Yamaguchi Yamaguchi 753-8515 Japan
5. Kagoshima Crane Conservation Committee; Izumi Kagoshima 899-0208 Japan