Submitted on: 04 June 2014.
Revised on: 05 July 2014.
Accepted on: 31 July 2014.
___________________BMC GASTROENTEROLOGY---BMC
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Submitted on: 14 August 2002.
Revised on: 26 September 2002.
Accepted on: 09 October 2002.
___________________BMC GASTROENTEROLOGY---BMC
Submitted on: 22 January 2003.
Revised on: 19 March 2003.
Accepted on: 16 April 2003.
___________________BMC GASTROENTEROLOGY---BMC
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Submitted on: 25 May 2015.
Revised on: 13 July 2015.
Accepted on: 28 August 2015.
___________________BMC GASTROENTEROLOGY---BMC
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