- Correspondence to Dr Takayuki Enomoto, Department of Obstetrics and Gynecology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan;
- Received February 28, 2019
- Revision received April 26, 2019
- Accepted May 2, 2019
- First published July 1, 2019.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.