Submitted on: 21 December 2010.
Revised on: 27 March 2011.
Accepted on: 23 May 2011.
___________________INTERNATIONAL JOURNAL OF GYNECOLOGY & OBSTETRICS
Submitted on: 25 June 2001.
Revised on: 26 September 2001.
Accepted on: 10 November 2001.
___________________INTERNATIONAL JOURNAL OF GYNECOLOGY & OBSTETRICS
Submitted on: 25 June 1998.
Revised on: 30 August 1998.
Accepted on: 25 October 1998.
___________________INTERNATIONAL JOURNAL OF GYNECOLOGY & OBSTETRICS
http://reply.papertrans.cn/2/135/13486/13486-34.png
Submitted on: 29 July 2006.
Revised on: 15 October 2006.
Accepted on: 06 December 2006.
___________________INTERNATIONAL JOURNAL OF GYNECOLOGY & OBSTETRICS
http://reply.papertrans.cn/2/135/13486/13486-36.png