Baozhu Huang 1 , Lili Gu 1 , Jiangyong Cao 2 , Jianying Wang 3 *
1 Gynecology Department, the Fifth Affiliated Hospital Sun Yat-sen University, Zhuhai, Guangdong, 519000, P.R.China
2 Maternity Ward, the Fifth Affiliated Hospital Sun Yat-sen University, Guangzhou, Zhuhai, 519000, P.R.China
3 Obstetrics and Gynecology Department, the Fifth Affiliated Hospital Sun Yat-sen University, Zhuhai, Guangdong, 519000, P.R.China
* Correspondence should be addressed to Jianying Wang (564902280@qq.com)
Received date: May 20, 2018; Accepted date: September 29, 2018; Published date: January 02, 2019
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