Qin, Lin
Article History
Received: 19 November 2022
Accepted: 6 March 2023
First Online: 14 March 2023
Declarations
:
: This study was approved by the ethics committees of Senior Department of Obstetrics & Gynecology of PLA General Hospital having approval no 2022KY100-KS001 and study was conducted in accordance with the Declaration of Helsinki. This study informed consent was obtained from all subjects and/or their legal guardian(s).
: Not applicable.
: The author declare no conflict of interest, financial or otherwise.