[1] Kyoto Univ, Grad Sch Med, Dept Neurol, Kyoto 6068507, Japan
[2] Kyoto Univ, Grad Sch Med, Dept Resp Care & Sleep Control Med, Kyoto 6068507, Japan
[3] Kobe Univ, Grad Sch Med, Div Neurol, Kobe, Hyogo 6500017, Japan
[4] Kyoto Univ, Grad Sch Med, Dept Epilepsy Movement Disorders & Physiol, Kyoto 6068507, Japan
[5] Natl Hosp Org Kyoto Med Ctr, Dept Neurol, Kyoto 6128555, Japan
[6] Kyoto Univ, Grad Sch Med, Dept Clin Lab Med, Kyoto 6068507, Japan
[7] Kyoto Univ, Grad Sch Med, Dept Neurosurg, Kyoto 6068507, Japan
[8] Shiga Gen Hosp, Dept Neurosurg, Moriyama, Shiga 5248524, Japan
[9] Ehime Univ, Grad Sch Med, Dept Neurosurg, Toon, Ehime 7910295, Japan