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Submitted on: 18 April 2009.
Revised on: 16 August 2009.
Accepted on: 22 September 2009.
___________________BIOMEDICAL RESEARCH-TOKYO---BIOMEDICAL RESEARCH PRESS LTD
Submitted on: 17 July 2008.
Revised on: 22 August 2008.
Accepted on: 06 October 2008.
___________________BIOMEDICAL RESEARCH-TOKYO---BIOMEDICAL RESEARCH PRESS LTD
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