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http://reply.papertrans.cn/2/159/15886/15886-32.png
Submitted on: 23 December 2006.
Revised on: 18 February 2007.
Accepted on: 27 March 2007.
___________________Journal of Clinical and Translational Science
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http://reply.papertrans.cn/2/159/15886/15886-35.png
Submitted on: 12 October 2007.
Revised on: 24 November 2007.
Accepted on: 19 December 2007.
___________________Journal of Clinical and Translational Science