Liu, Ye
Li, Xiaoguang
Che, Xiangming
Zhao, Guosheng
Xu, Mingjun
Funding for this research was provided by:
Beijing Obstetrics and Gynecology Hospital (FCYY201904)
Article History
Received: 3 March 2020
Accepted: 28 July 2020
First Online: 7 August 2020
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee (Beijing Obstetrics and Gynecology Hospital, Capital Medical University ethics committee + 2016-XJS-003-01) and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all participants and was written in this study.Our study adheres to CONSORT guidelines for reporting clinical trials.
: Not applicable.
: The authors declare that they have no competing interests.