Shunsuke Shimamura,^* Yukihiro Shiota,^* Naoko Takagi,^* Tatsuya Habara,^* Shougo Hirata,^* Hitoshi Komai,^* Satoko Nishimura,^* Hiroyuki Tani,^* Terumasa Shimada<sup>*


*</sup>From the Veterinary Medical Center, School of Life and Environmental Science, Osaka Prefecture University, 1-58 Rinku Ourai Kita, Izumisano, Osaka 598-8531, Japan (Shimamura, Hirata, Nishimura, Shimada); the Laboratory of Veterinary Internal Medicine, Division of Veterinary Science, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-58 Rinku Ourai Kita, Izumisano, Osaka 598-8531, Japan (Komai, Tani); the Kyoto City Zoo, Okazaki Koen, Okazaki Houshoji, Sakyo, Kyoto 606-8333, Japan (Shiota, Takagi); and the Daktari Animal Hospital, 20-9 Goryoudukanokoshi, Nishigyo, Kyoto 615-8234, Japan (Habara). Present address (Satoko Nishimura): U.C. Davis, One Shields Avenue, Davis, California 95616-8747, USA. Correspondence should be directed to Dr. Shimamura (shimamur@vet.osakafu-u.ac.jp).