- Address correspondence and reprint requests to Manabu Sakurai, MD, Faculty of Medicine, Department of Obstetrics and Gynecology, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8575, Japan. E-mail: .
- Received May 24, 2016
- Accepted August 24, 2016
- First published January 1, 2016.
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