1. Department of Neurology, Jichi Medical School, Tochigi, 329-0498 Japan
2. Tsukuba Primate Center, National Institutes of Infectious Diseases, Ibaraki, 305-0843 Japan
3. Division of Genetic Therapeutics, Center for Molecular Medicine, Jichi Medical School, Tochigi, 329-0498 Japan
4. Department of Neurosurgery, Gunma University, Gunma, 371-8511 Japan
5. Department of Anatomy, Fujita Health University, Aichi, 470-1192 Japan
6. Institute for Comprehensive Medical Science, Fujita Health University, Aichi, 470-1192 Japan