Submitted on: 02 May 2003.
Revised on: 24 May 2003.
Accepted on: 30 May 2003.
Journal of Ultrasound---SPRINGER INT PUBL AG
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Submitted on: 24 October 2013.
Revised on: 09 November 2013.
Accepted on: 25 November 2013.
Journal of Ultrasound
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Submitted on: 21 November 2011.
Revised on: 01 January 2012.
Accepted on: 28 January 2012.
Journal of Ultrasound
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