Submitted on: 14 December 2006.
Revised on: 11 April 2007.
Accepted on: 09 May 2007.
___________________CLINICAL OBSTETRICS AND GYNECOLOGY
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Submitted on: 15 July 2004.
Revised on: 23 October 2004.
Accepted on: 04 December 2004.
___________________CLINICAL OBSTETRICS AND GYNECOLOGY
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