1. Laboratory of Veterinary Neurology, Department of Veterinary Medicine, College of Bioresource Science, Nihon University, Kanagawa, Japan
2. Laboratory of Comparative Immunology, Department of Veterinary Medicine, College of Bioresource Science, Nihon University, Kanagawa, Japan
3. Faculty of Medicine, Okayama University of Science, Ehime, Japan
4. Department of Legal Medicine, Nihon University School of Dentistry, Tokyo, Japan
5. Laboratory of Veterinary Internal Medicine, Department of Veterinary Medicine, College of Bioresource Science, Nihon University, Kanagawa, Japan
6. Neurology and Neurosurgery Service, Veterinary Specialists and Emergency Center, Saitama, Japan