scientific article published on November 5, 2012
author: Hidemi Ito, Nobuyuki Hamajima, Michiaki Kubo, Kenji Wakai, Mariko Naito, Sayo Kawai, Sadao Suzuki, Haruo Mikami, Keizo Ohnaka, Kokichi Arisawa, Takeshi Imaizumi, Hideshi Niimura, Takahiro Higashibata, Yoshikuni Kita, Masako Shigeta