Submitted on: 11 May 2011.
Revised on: 18 July 2011.
Accepted on: 21 August 2011.
___________________Best Practice & Research Clinical Gastroenterology
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Submitted on: 13 July 2002.
Revised on: 09 October 2002.
Accepted on: 22 October 2002.
___________________Best Practice & Research Clinical Gastroenterology
Submitted on: 26 October 2015.
Revised on: 22 January 2016.
Accepted on: 21 March 2016.
___________________Best Practice & Research Clinical Gastroenterology
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Submitted on: 11 September 2023.
Revised on: 25 November 2023.
Accepted on: 07 January 2024.
___________________Best Practice & Research Clinical Gastroenterology
Submitted on: 20 August 1999.
Revised on: 10 November 1999.
Accepted on: 27 November 1999.
___________________Best Practice & Research Clinical Gastroenterology