- Correspondence to Dr Jing Gao, Huai’an Maternity and Child Care Hospital, Huai’an, Jiangsu 223002, China; and Professor Xuefeng Yu, The Fourth Affiliated Hospital of Nanchang University, 133 Square South Road, Nanchang, Jiangxi 330003, China;
- Received November 22, 2016
- Revised July 14, 2017
- Accepted August 13, 2017
- First published November 4, 2017.
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.