Submitted on: 03 November 2003.
Revised on: 24 November 2003.
Accepted on: 02 January 2004.
___________________EJSO---ELSEVIER SCI LTD
Submitted on: 08 February 2001.
Revised on: 01 April 2001.
Accepted on: 24 May 2001.
___________________EJSO---ELSEVIER SCI LTD
Submitted on: 16 November 2004.
Revised on: 12 February 2005.
Accepted on: 05 March 2005.
___________________EJSO---ELSEVIER SCI LTD
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Submitted on: 20 August 2009.
Revised on: 17 September 2009.
Accepted on: 03 October 2009.
___________________EJSO---ELSEVIER SCI LTD