1 Department of Neurology, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, Mie, 514-8507, Japan. nakamura-n@clin.medic.mie-u.ac.jp.
2 Department of Neurology, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, Mie, 514-8507, Japan. hidehiro-i@med.mie-u.ac.jp.
3 Department of Neurology, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, Mie, 514-8507, Japan.
4 Department of Medicine (Neurology and Rheumatology), Shinshu University School of Medicine, Nagano, Japan.
5 Department of Neuroradiology, Mie University Graduate School of Medicine, Tsu City, Mie, Japan.