Submitted on: 15 April 2003.
Revised on: 27 July 2003.
Accepted on: 07 August 2003.
___________________Atherosclerosis Plus---ELSEVIER
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Submitted on: 17 November 2003.
Revised on: 26 January 2004.
Accepted on: 08 March 2004.
___________________Atherosclerosis Plus---ELSEVIER
Submitted on: 14 May 2002.
Revised on: 03 August 2002.
Accepted on: 24 September 2002.
___________________Atherosclerosis Plus---ELSEVIER