- Address correspondence and reprint requests to Beihua Kong, MD, PhD, Department of Obstetrics and Gynecology, Qilu Hospital, Shandong University, 107W, Wenhua Road, Ji’nan, Shandong 250012, P. R. China. E-mail: .
- Received June 17, 2016
- Accepted August 19, 2016
- First published January 1, 2016.
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