Zhang, Ling
Wang, Lei
Yuan, Qiuyu
Huang, Cui
Cui, Shu
Zhang, Kai
Zhou, Xiaoqin
Article History
Received: 29 November 2020
Accepted: 30 March 2021
First Online: 16 April 2021
Declarations
:
: The ethics committee of Chaohu Hospital of Anhui Medical University approved the study protocol. All participating pregnant women signed an informed consent form.
: All participants agreed to record and publish anonymous data.
: The authors do not have potential conflicts of interest to report.