[1] Kariya Toyota Gen Hosp, Dept Neurosurg, Sumiyoshi Cho 5-15, Kariya, Aichi, Japan
[2] Tosei Gen Hosp, Dept Neurosurg, Nishi Oiwake Cho 160, Seto, Aichi, Japan
[3] Tosei Gen Hosp, Dept Neurol, Nishi Oiwake Cho 160, Seto, Aichi, Japan
[4] Natl Ctr Geriatr & Gerontol, Dept Radiol, Morioka Cho 7-430, Obu, Aichi, Japan
[5] Tosei Gen Hosp, Dept Pathol, Nishi Oiwake Cho 160, Seto, Aichi, Japan
[6] Nagoya Daini Hosp, Dept Neurosurg, Japanese Red Cross Aichi Med Ctr, Myoken Cho 2-9,Showa Ku, Nagoya, Japan
[7] Nagoya Univ, Dept Neurosurg, Grad Sch Med, Tsurumai Cho 65,Showa Ku, Nagoya, Aichi, Japan