[1] Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Neurol, Okayama 7008558, Japan
[2] Kyoritsu Univ Pharm, Dept Clin Pharm, Div Pharmacol, Tokyo, Japan
[3] Natl Ctr Geriatr & Gerontol, Dept Alzheimers Dis Res, Natl Inst Longev Sci, Aichi, Japan
[4] Gunma Univ, Dept Neurol, Grad Sch Med, Gunma, Japan
[5] Maebashi Red Cross Hosp, Dept Neurol, Gunma, Japan
[6] Hirosaki Univ, Sch Med, Dept Neurol Sci, Inst Brain Sci, Hirosaki, Aomori 036, Japan
[7] Kyoto Univ, Dept Neurol, Grad Sch Med, Kyoto, Japan