Funding for this research was provided by:
This work was supported by the Guangzhou Fundamental research projects jointly funded by municipal schools (No. 202102010131)
Received: 14 September 2021
Accepted: 1 November 2021
First Online: 20 November 2021
: The study received ethical clearance from the Research Board at the Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
: All participants provided informed consent.
: The authors declared that they have no competing interests.