1. Laboratory of Veterinary Internal Medicine, Companion Animal Internal Medicine, Department of Companion Animal Clinical Sciences, School of Veterinary Medicine, Rakuno Gakuen University, 582-1 Bunkyodai-Midorimachi, Ebetsu 069-0836, Japan
2. Laboratory of Veterinary Biochemistry, Department of Veterinary Medicine, School of Veterinary Medicine, Rakuno Gakuen University, 582-1 Bunkyodai-Midorimachi, Ebetsu 069-0836, Japan
3. Laboratory of Small Animal Clinics, Veterinary Teaching Hospital, Graduate School of Veterinary Science, Azabu University, 1-17-71 Fuchinobe, Chuo-ku, Sagamihara 52-5201, Japan
4. Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
5. Laboratory of Veterinary Surgery, Graduate School of Life and Environmental Sciences, Osaka Metropolitan University, 1-58 Rinku-Oraikita, Izumisano 598-8531, Japan