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Submitted on: 20 December 2002.
Revised on: 14 February 2003.
Accepted on: 13 March 2003.
___________________International Journal of Surgery-Oncology
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Submitted on: 12 February 2008.
Revised on: 25 May 2008.
Accepted on: 30 June 2008.
___________________International Journal of Surgery-Oncology