Open access peer-reviewed chapter
By Yutaka Takata, Toshihiro Ansai, Inho Soh, Shuji Awano, Yutaka Yoshitake, Yasuo Kimura, Ikuo Nakamichi, Sumio Akifusa, Kenichi Goto, Akihiro Yoshida, Ritsuko Fujisawa, Kazuo Sonoki, and Tatsuji Nishihara
Submitted: April 19th 2011Reviewed: June 30th 2011Published: February 24th 2012
© 2012 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution 3.0 License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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