1. Companion Animal Medical Imaging Center, 3-5-7 Hisamoto, Takasu, Kawasaki, Kanagawa 213-0011, Japan
2. Synergy Animal General Hospital, 815 Ishigami, Kawaguchi, Saitama 333-0823, Japan
3. Laboratory of Veterinary Pathology, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252-0880, Japan