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Submitted on: 07 December 1999.
Revised on: 19 February 2000.
Accepted on: 26 March 2000.
___________________Journal of the Practice of Cardiovascular Sciences
Submitted on: 18 December 2005.
Revised on: 14 March 2006.
Accepted on: 03 April 2006.
___________________Journal of the Practice of Cardiovascular Sciences
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Submitted on: 13 December 2002.
Revised on: 20 February 2003.
Accepted on: 25 March 2003.
___________________Journal of the Practice of Cardiovascular Sciences