[1] Kitasato Univ, Dept Neurol, Sch Med, Sagamihara, Kanagawa, Japan
[2] Kitasato Univ, Dept Pathol, Sch Med, Sagamihara, Kanagawa, Japan
[3] Kitasato Univ Hosp, Dept Clin Lab, Sagamihara, Kanagawa, Japan
[4] Shizuoka City Shimizu Hosp, Dept Neurol, Shizuoka, Japan
[5] Nippon Med Sch, Dept Emergency & Crit Care Med, Tama Nagayama Hosp, Tama, Japan
[6] Fukushima Med Univ, Dept Neurol, Sch Med, Fukushima, Japan
[7] Ehime Prefectural Cent Hosp, Dept Neurol, Matsuyama, Ehime, Japan
[8] Keiyu Hosp, Dept Neurol, Yokohama, Kanagawa, Japan