1. Drug Developmental Research Laboratories, Shionogi & Co., Ltd., 3–1–1, Futaba-Cho, Toyonaka, Osaka 561–0825, Japan
2. Veterinary Medicine, Gifu University, 1–1 Yanagido, Gifu, Gifu 501–1194, Japan
3. Laboratory of Sustainable Environmental Biology, Graduate School of Agricultural Science, Tohoku University, Naruko-Onsen, Osaki, Miyagi 989–6711, Japan
4. Laboratory of Veterinary Pathology, Yamaguchi University, 1677–1 Yoshida, Yamaguchi-City, Yamaguchi 753–8511, Japan
5. The Institute of Medical Science, The University of Tokyo, 4–6–1 Shirogane-dai, Minato-ku, Tokyo 108–8639, Japan
6. Korea Secretary General of Asian Society of Zoo and Wildlife Medicine, College of Veterinary Medicine, Seoul National University, Seoul 151–742, Korea