Submitted on: 11 May 2006.
Revised on: 17 June 2006.
Accepted on: 28 June 2006.
LIFE SCIENCES---PERGAMON-ELSEVIER SCIENCE LTD
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Submitted on: 28 December 2008.
Revised on: 05 February 2009.
Accepted on: 18 February 2009.
LIFE SCIENCES---PERGAMON-ELSEVIER SCIENCE LTD
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http://reply.papertrans.cn/3/209/20855/20855-16.png
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Submitted on: 03 November 1998.
Revised on: 30 November 1998.
Accepted on: 07 December 1998.
LIFE SCIENCES---PERGAMON-ELSEVIER SCIENCE LTD
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