Tetsuro Kawazoe1, Masahiko Sugiyama1, Kimiaki Hashiguchi2, Ryota Nakanishi1, Junji Kurashige1, Yuichiro Nakashima1, Hiroshi Saeki1, Eiji Oki1, Yoshihiko Maehara1
Departments of 1Surgery and Science & 2Neurosurgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.