scientific article published on 23 September 2009
author: Toshiro Maekawa, Kazuaki Chayama, Michio Imamura, Masataka Tsuge, Shoichi Takahashi, Shinji Tanaka, Hidenori Ochi, Nobuhiko Hiraga, Shosuke Kitamura, Fukiko Mitsui, Chise Tateno, Katsutoshi Yoshizato
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