- Address correspondence and reprint requests to Shu-zhong Yao, MD, Department of Obstetrics and Gynecology, the First Affiliated Hospital, Sun Yat-sen University, Zhongshan Second Road 58, Guangzhou 510700, PR China. E-mail: firstname.lastname@example.org.
- Received October 12, 2015
- First published September 1, 2016.
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