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Open access peer-reviewed chapter
By Tadashi Yamamoto, Makoto Saito, Kentaro Kumazawa, Ayano Doi, Atsuka Matsui, Shiori Takebe, Takuya Amari, Masaaki Oyama and Kentaro Semba
Submitted: November 16th 2010Reviewed: June 27th 2011Published: November 30th 2011
© 2011 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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