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Submitted on: 01 September 2001.
Revised on: 24 October 2001.
Accepted on: 13 December 2001.
___________________Best Practice & Research Clinical Gastroenterology
Submitted on: 17 February 2000.
Revised on: 12 April 2000.
Accepted on: 23 May 2000.
___________________Best Practice & Research Clinical Gastroenterology
Submitted on: 24 January 2024.
Revised on: 29 April 2024.
Accepted on: 20 May 2024.
___________________Best Practice & Research Clinical Gastroenterology
Submitted on: 01 April 2020.
Revised on: 17 June 2020.
Accepted on: 13 July 2020.
___________________Best Practice & Research Clinical Gastroenterology
Submitted on: 10 March 2000.
Revised on: 08 June 2000.
Accepted on: 05 July 2000.
___________________Best Practice & Research Clinical Gastroenterology
Submitted on: 25 June 2004.
Revised on: 15 August 2004.
Accepted on: 10 October 2004.
___________________Best Practice & Research Clinical Gastroenterology
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Submitted on: 28 June 2021.
Revised on: 07 September 2021.
Accepted on: 24 October 2021.
___________________Best Practice & Research Clinical Gastroenterology