[1
]
Department of Neurology, University of Yamanashi, Yamanashi, 409-3898, Japan.
[2
]
Department of Radiology, University of Yamanashi, Yamanashi, 409-3898, Japan.
[3
]
Department of Neurology, Gifu University Graduate School of Medicine, Gifu, 501-1194,
Japan.
[4
]
Department of Neurology, University of Yamanashi, Yamanashi, 409-3898, Japan. ytakiyama@yamanashi.ac.jp.