1. Graduate School of Medicine, Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto, Japan.
2. Graduate School of Engineering, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto, Japan.
3. Divisions of Veterinary Surgery, Nippon Veterinary and Animal Science University, Kyonan-cho, Musashino-shi, Tokyo, Japan.
4. National Institute of Agrobiological Sciences, Tsukuba, Ibaraki, Japan.