[1] Hirosaki Univ, Grad Sch Med, Dept Neurol, Inst Brain Sci, Hirosaki, Aomori, Japan
[2] Hirosaki Univ, Grad Sch Med, Dept Resp Med, Hirosaki, Aomori, Japan
[3] Hirosaki Univ, Grad Sch Med, Dept Neuropsychiat, Hirosaki, Aomori, Japan
[4] Hirosaki Univ Hosp, Dept Neurol, Hirosaki, Aomori, Japan