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Submitted on: 13 December 2000.
Revised on: 22 February 2001.
Accepted on: 08 March 2001.
___________________Hepatobiliary & Pancreatic Diseases International
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Submitted on: 06 December 2008.
Revised on: 25 January 2009.
Accepted on: 15 February 2009.
___________________Hepatobiliary & Pancreatic Diseases International
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Submitted on: 30 November 2002.
Revised on: 08 February 2003.
Accepted on: 25 March 2003.
___________________Hepatobiliary & Pancreatic Diseases International
Submitted on: 25 July 2009.
Revised on: 09 September 2009.
Accepted on: 22 October 2009.
___________________Hepatobiliary & Pancreatic Diseases International