1. Division of Infection Control and Disease Prevention Graduate School of Agricultural and Life SciencesThe University of Tokyo Tokyo Japan
2. Laboratory of Veterinary Pathology Graduate School of Agricultural and Life SciencesThe University of Tokyo Tokyo Japan
3. Department of Applied Science Faculty of Veterinary Science School of Veterinary Nursing and TechnologyNippon Veterinary and Life Science University Tokyo Japan
4. Department of Basic Science Faculty of Veterinary Science School of Veterinary Nursing and TechnologyNippon Veterinary and Life Science University Tokyo Japan
5. Department of Global Agricultural Sciences Graduate School of Agricultural and Life SciencesThe University of Tokyo Tokyo Japan
6. Mitsuishi Animal Medical Center Hokkaido South Agricultural Mutual Aid Association Hokkaido Japan
7. Yamato Kohgen Animal Medical Clinic Ibaraki Japan