1. Laboratory of Veterinary Surgery, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan
2. Animal Medical Center, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan
3. Department of Pet Science and Technology, Shandong Vocational Animal Science and Veterinary College, Weifang, Shandong 261061, China
4. Laboratory of Veterinary Microbiology, Tokyo University of Agriculture and Technology, Tokyo 183-8509, Japan
5. Laboratory of Veterinary Diagnostic Imaging, Cooperative Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan