- Address correspondence and reprint requests to Manabu Sakurai, MD, Department of Obstetrics and Gynecology, Faculty of Medicine, University of Tsukuba, 1-1-1, Tennoudai, Tsukuba, Ibaraki 305-8575, Japan. E-mail: .
- Received July 24, 2014
- Accepted January 21, 2015
- First published May 1, 2015.
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