He, Ping
Wang, Jing-jing
Duan, Wei
Song, Chao
Yang, Yu
Wu, Qing-qing http://orcid.org/0000-0002-6836-9192
Article History
Received: 17 June 2021
Accepted: 17 November 2021
First Online: 2 December 2021
Declarations
:
: The study was approved by the Institutional Ethics Committee of Beijing Obstetrics and Gynecology Hospital Affiliated to Capital Medical University.
: Not applicable.
: The authors declare that they have no competing interests.