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Submitted on: 27 November 2000.
Revised on: 13 February 2001.
Accepted on: 04 April 2001.
___________________BMC Womens Health---BMC
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Submitted on: 29 March 2024.
Revised on: 25 April 2024.
Accepted on: 27 May 2024.
___________________BMC Womens Health---BMC
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Submitted on: 28 March 2003.
Revised on: 11 July 2003.
Accepted on: 31 July 2003.
___________________BMC Womens Health---BMC