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Submitted on: 14 October 2001.
Revised on: 23 January 2002.
Accepted on: 07 February 2002.
___________________JOURNAL OF DIAGNOSTIC MEDICAL SONOGRAPHY
Submitted on: 31 March 2016.
Revised on: 11 July 2016.
Accepted on: 25 July 2016.
___________________JOURNAL OF DIAGNOSTIC MEDICAL SONOGRAPHY