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Submitted on: 04 September 1998.
Revised on: 04 November 1998.
Accepted on: 23 November 1998.
___________________Gastroenterology Report---OXFORD UNIV PRESS
Submitted on: 01 December 2000.
Revised on: 19 January 2001.
Accepted on: 17 March 2001.
___________________Gastroenterology Report---OXFORD UNIV PRESS
Submitted on: 09 March 2012.
Revised on: 04 June 2012.
Accepted on: 09 July 2012.
___________________Gastroenterology Report---OXFORD UNIV PRESS
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Submitted on: 27 February 2006.
Revised on: 17 April 2006.
Accepted on: 19 May 2006.
___________________Gastroenterology Report---OXFORD UNIV PRESS
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