Submitted on: 17 May 2009.
Revised on: 08 September 2009.
Accepted on: 08 October 2009.
___________________Journal of Maternal-Fetal & Neonatal Medicine
Submitted on: 05 July 2013.
Revised on: 26 September 2013.
Accepted on: 11 November 2013.
___________________Journal of Maternal-Fetal & Neonatal Medicine
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Submitted on: 15 January 2003.
Revised on: 23 April 2003.
Accepted on: 27 May 2003.
___________________Journal of Maternal-Fetal & Neonatal Medicine
http://reply.papertrans.cn/2/179/17886/17886-35.png
Submitted on: 03 September 2009.
Revised on: 03 November 2009.
Accepted on: 20 November 2009.
___________________Journal of Maternal-Fetal & Neonatal Medicine