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Open access peer-reviewed chapter
By Renata Boldrin de Araujo, Célia Regina Nogueira, Jose Vicente Tagliarini, Emanuel Celice Castilho, Mariângela de Alencar Marques, Yoshio Kiy, Lidia R. Carvalho and Gláucia M. F. S. Mazeto
Submitted: May 23rd 2011Reviewed: October 3rd 2011Published: March 7th 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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