Liu, Songping
Xin, Weijuan
Tang, Xiaoyan
Qiu, Junjun
Zhang, Yajiao
Hua, Keqin
Article History
Received: 6 September 2019
Accepted: 5 November 2019
First Online: 28 May 2020
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: Institutional review board approval was received from Zhenjiang Maternal and Child Health Hospital, and all patients provided informed consent for the investigation and experiments.