- Address correspondence and reprint requests to Yi Zhang, MD, PhD, Department of Gynecology, the First Affiliated Hospital of China Medical University, 155 Nanjing North St, Shenyang 110001, Liaoning, P.R. China. E-mail: .
- Received January 4, 2015
- Accepted March 19, 2015
- First published July 1, 2015.
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