1. Department of Veterinary Pathology, Tottori University, 4–101 Koyama Minami, Tottori 680–8553, Japan
2. The United Graduate School of Veterinary Science, Yamaguchi University, 1667–1 Yoshida, Yamaguchi 753–8515, Japan
3. Laboratory of Pathology, School of Life and Environmental Science, Azabu University, 1–17–71 Fuchinobe, Sagamihara-shi, Kanagawa 252–5201, Japan
4. Department of Veterinary Biochemistry, Tottori University, 4–101 Koyama Minami, Tottori 680–8553, Japan
5. Department of Environmental Biochemistry, Yamanashi Institute of Environmental Sciences, 5597-1 Fujiyoshida, Yamanashi 403–0005, Japan
6. Basic Medical Research Center, International University of Health and Welfare, 2600–1 Kitakanamura, Ootawara-shi, Tochigi 324–8501, Japan
7. Department of Environmental Engineering, Kyoto University Graduate School of Engineering, Kyoto Daigaku Katsura, Saikyo-ku, Kyoto 615–8530, Japan