[1] NHO Osaka Natl Hosp, Dept Stroke Neurol, Osaka, Japan
[2] Kobe City Med Ctr Gen Hosp, Dept Neurol, Kobe, Hyogo, Japan
[3] Kobe City Med Ctr Gen Hosp, Dept Neurosurg, Kobe, Hyogo, Japan
[4] Kyorin Univ, Dept Stroke & Cerebrovasc Med, Mitaka, Tokyo, Japan
[5] Kumamoto City Hosp, Dept Neurol, Kumamoto, Japan
[6] Iwate Med Univ, Dept Neurosurg, Yahaba, Iwate, Japan
[7] Kyoto Univ, Dept Neurosurg, Kyoto, Japan