Submitted on: 23 September 1999.
Revised on: 03 November 1999.
Accepted on: 14 November 1999.
___________________Clinics in Colon and Rectal Surgery
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Submitted on: 26 November 2005.
Revised on: 09 January 2006.
Accepted on: 08 March 2006.
___________________Clinics in Colon and Rectal Surgery
Submitted on: 06 August 1999.
Revised on: 06 October 1999.
Accepted on: 14 November 1999.
___________________Clinics in Colon and Rectal Surgery