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Submitted on: 02 October 2002.
Revised on: 29 November 2002.
Accepted on: 27 January 2003.
___________________Biomedical Journal---ELSEVIER
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Submitted on: 18 January 2003.
Revised on: 06 May 2003.
Accepted on: 11 June 2003.
___________________Biomedical Journal---ELSEVIER
Submitted on: 28 August 2008.
Revised on: 24 September 2008.
Accepted on: 03 November 2008.
___________________Biomedical Journal---ELSEVIER
Submitted on: 27 April 2000.
Revised on: 30 May 2000.
Accepted on: 22 July 2000.
___________________Biomedical Journal---ELSEVIER
Submitted on: 01 July 2007.
Revised on: 10 September 2007.
Accepted on: 04 October 2007.
___________________Biomedical Journal---ELSEVIER
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