1. Laboratory of Veterinary Internal Medicine, School of Veterinary Medicine; Research Institute of Bioscience, Azabu University, 1-17-71 Fuchinobe, Sagamihara, Kanagawa, 229-8501, Japan
2. Laboratory of Veterinary Internal Medicine, School of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Sagamihara, Kanagawa, 229-8501, Japan
3. Doubutsu Medical Center, 1-6-45 Nakahozumi, Ibaraki-shi, Osaka 567-0034, Japan
4. Laboratory of Veterinary Radiology, School of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Sagamihara, Kanagawa, 229-8501, Japan