[1] Kyoto Prefectural Univ Med, Grad Sch Med Sci, Dept Neurol, Kyoto, Japan
[2] Kyoto Univ, Grad Sch Med, Dept Neurol, Kyoto, Japan
[3] Kitano Hosp, Med Res Inst, Tazuke Kofukai Fdn, Dept Neurol, Osaka, Japan
[4] Ehime Univ, Grad Sch Med, Dept Neurol & Geriatr Med, Toon, Japan