Submitted on: 16 September 2008.
Revised on: 10 October 2008.
Accepted on: 03 November 2008.
___________________Journal of Gastrointestinal and Liver Diseases
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Submitted on: 20 November 2000.
Revised on: 22 January 2001.
Accepted on: 15 February 2001.
___________________Journal of Gastrointestinal and Liver Diseases
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http://reply.papertrans.cn/2/170/16961/16961-35.png
Submitted on: 26 February 2002.
Revised on: 20 May 2002.
Accepted on: 27 June 2002.
___________________Journal of Gastrointestinal and Liver Diseases