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Submitted on: 03 February 2003.
Revised on: 17 May 2003.
Accepted on: 05 July 2003.
___________________Cardiovascular Ultrasound---BMC
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Submitted on: 19 May 2001.
Revised on: 24 August 2001.
Accepted on: 17 October 2001.
___________________Cardiovascular Ultrasound---BMC
Submitted on: 09 October 2019.
Revised on: 19 December 2019.
Accepted on: 08 January 2020.
___________________Cardiovascular Ultrasound---BMC
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Submitted on: 04 July 2013.
Revised on: 31 October 2013.
Accepted on: 18 December 2013.
___________________Cardiovascular Ultrasound---BMC