Gao, Yang
Funding for this research was provided by:
Tianjin Key Medical Discipline(Specialty) Construction Project
Article History
Received: 26 December 2022
Accepted: 2 May 2023
First Online: 15 May 2023
Declarations
:
: This study was approved by the Ethics Committee of the Tianjin Central Obstetrics and Gynecology Hospital (2017-KY98). All procedures were performed in accordance with the ethical standards of the institutional and national research committee and the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.
: Not applicable.
: The authors declare no competing interests.