http://reply.papertrans.cn/3/216/21528/21528-21.png
http://reply.papertrans.cn/3/216/21528/21528-22.png
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Submitted on: 10 October 2012.
Revised on: 28 October 2012.
Accepted on: 16 November 2012.
MCN-The American Journal of Maternal-Child Nursing
Submitted on: 07 August 1999.
Revised on: 23 August 1999.
Accepted on: 01 September 1999.
MCN-The American Journal of Maternal-Child Nursing
http://reply.papertrans.cn/3/216/21528/21528-26.png
Submitted on: 12 February 1999.
Revised on: 03 March 1999.
Accepted on: 24 March 1999.
MCN-The American Journal of Maternal-Child Nursing
http://reply.papertrans.cn/3/216/21528/21528-28.png
Submitted on: 25 January 1999.
Revised on: 24 February 1999.
Accepted on: 07 March 1999.
MCN-The American Journal of Maternal-Child Nursing
Submitted on: 20 January 2010.
Revised on: 20 February 2010.
Accepted on: 07 March 2010.
MCN-The American Journal of Maternal-Child Nursing