1. Department of Neurology Keio University School of Medicine Tokyo Japan
2. Department of Neurology Kitasato University School of Medicine Sagamihara Japan
3. Department of Pathology Keio University School of Medicine Tokyo Japan
4. Department of Pediatrics Fujita Health University School of Medicine Toyoake Japan
5. Department of Pathology National Institute of Infectious Diseases Tokyo Japan
6. Department of Clinical Laboratory National Center of Neurology and Psychiatry (NCNP) National Center Hospital Kodaira Japan