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Submitted on: 28 August 1999.
Revised on: 15 October 1999.
Accepted on: 11 November 1999.
___________________BMC Surgery---BMC
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Submitted on: 08 June 2015.
Revised on: 07 August 2015.
Accepted on: 08 September 2015.
___________________BMC Surgery---BMC
Submitted on: 22 September 2010.
Revised on: 21 December 2010.
Accepted on: 08 February 2011.
___________________BMC Surgery---BMC
Submitted on: 03 December 2014.
Revised on: 12 March 2015.
Accepted on: 12 April 2015.
___________________BMC Surgery---BMC