Yuan, Xianxian
Zhao, Jinqi
Wang, Jia
Zheng, Wei
Kong, Yuanyuan
Li, Guanghui
Funding for this research was provided by:
Beijing Natural Science Foundation (No. 7214231)
Scientific Research Common Program of Beijing Municipal Commission of Education (KM202110025007)
Beijing Hospitals Authority’ Ascent Plan (DFL20191402)
Article History
Received: 28 November 2022
Accepted: 9 April 2023
First Online: 25 May 2023
Declarations
:
: This study has been performed in accordance with the Declaration of Helsinki and has been approved by the ethics committee of Beijing Obstetrics and Gynecology Hospital, Capital Medical University (2018-ky-009-01). Since the anonymous data were respectively extracted from the electronic record without any information that could identify particular individual, a waiver of informed consent was granted by the ethics committee of Beijing Obstetrics and Gynecology Hospital, Capital Medical University. All methods were carried out in accordance with relevant guidelines and regulations in the declaration.
: Not applicable.
: The authors declare that they have no competing interests.