Submitted on: 17 September 2011.
Revised on: 09 January 2012.
Accepted on: 05 March 2012.
___________________Journal of Cardiovascular Echography
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Submitted on: 30 July 2023.
Revised on: 25 October 2023.
Accepted on: 16 November 2023.
___________________Journal of Cardiovascular Echography
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