Toshiya Matsuda¹, Kazuo Nakamichi⁵, Taiichiro Kobayashi², Kouichiro Mori³, Hideo Arai⁴, Hiroaki Yokote¹, Jung Seowoong², Masaru Tanaka², Kazuaki Fukushima², Akifumi Imamura², Tsuyoshi Hamaguchi⁶, Ryusuke Ae⁷, Hidehiro Mizusawa⁸, Masahito Yamada⁹, Masaki Takao¹⁰, Yoshiharu Miura¹ (1.Department of Neurology,Tokyo Metropolitan Komagome Hospital, Japan, 2.Department of Infectious Diseases,Tokyo Metropolitan Komagome Hospital, Japan, 3.Department of Radiology, Tokyo Metropolitan Komagome Hospital, Japan, 4.Department of Pathology, Tokyo Metropolitan Komagome Hospital, Japan, 5.Department of Virology 1, National Institute of Infectious Diseases, Japan, 6.Department of Neurology, Kanazawa Medical University, Japan, 7.Division of Public Health, Center for Community Medicine, Jichi Medical University, Japan, 8.National Center Hospital, National Center of Neurology and Psychiatry, Japan, 9.Division of Neurology, Department of Internal Medicine, Kudanzaka Hospital, Japan, 10.Department of Laboratory Medicine, National Center Hospital, National Center of Neurology and Psychiatry, Japan)

Yoshiharu Miura¹, Kazuo Nakamichi², Ryuusuke Ae³, Kenta Takahashi⁴, Koichirou Mori¹², Tsuyoshi Hamaguchi⁵, Kazuya Takahashi⁶, Motohiro Yukitake⁷, Toshiya Matsuda¹, Hiroaki Yokote¹, Nobuo Sanjou¹¹, Jin Nakahara⁹, Hidehiro Mizusawa¹³, Masahito Yamada⁸, Masaki Takao¹⁰ (1.Department of Neurology,Tokyo Metropolitan Komagome Hospital, Japan, 2.Department of Virology 1, National Institute of Infectious Diseases, Japan, 3.Division of Public Health, Center for Community Medicine, Jichi Medical University, Japan, 4.Department of Pathology, National Institute of Infectious Diseases, Japan, 5.Department of Neurology, Kanazawa Medical University, Japan, 6.Department of Neurology, Hokuriku Brain and Neuromuscular Disease Center, National Hospital Organization Iou National Hospital, Japan, 7.Department of Neurology, Kouhoukai Takagi Hospital, Japan, 8.Division of Neurology, Department of Internal Medicine, Kudanzaka Hospital, Japan, 9.Department of Neurology, Keio University School of Medicine, Japan, 10.Department of Laboratory Medicine, National Center Hospital, National Center of Neurology and Psychiatry, Japan, 11.Department of Neurology and Neurological Science, Tokyo Medical and Dental University Graduate School of Medical and Dental Sciences, Japan, 12.Department of Pathology, Tokyo Metropolitan Komagome Hospital, Japan, 13.National Center Hospital, National Center of Neurology and Psychiatry, Japan)

Seira Hatake, Hiroshi Nagayama, Toshiyuki Hayashi, Kazumi Kimura (Nippon Medical School Hospital, Department of Neurology, Japan)

Motohiro Suzuki¹, Taro Ishiguro¹, Tadashi Kanouchi¹, Nobuo Sanjo^1,2, Yoichiro Nishida¹, Takanori Yokota¹ (1.Tokyo medical and dental university hospital neurology, Japan, 2.Kudanzaka hospital neurology, Japan)

Kohei Suzuyama¹, Makoto Eriguchi², Toshihiro Ide¹, Tetsuyuki Kitamoto³, Haruki Koike¹ (1.Division of Neurology, Department of Internal, Medicine, Saga University Faculty of Medicine, Japan, 2.Department of Neurology, Saga Prefectural Hospital Koseikan, Japan, 3.Department of Neurological Science, Tohoku University Graduate School of Medicine, Japan)

Yuki Taira, Taijun Yunoki, Yumiko Nakano, Chika Matsuoka, Yousuke Osakada, Tomohito Kawano, Mami Takemoto, Ryuta Morihara, Toru Yamasita, Hiroyuki Ishiura (Okayama University Hospital, Department of Neurology, Japan)