Wu, Tianchen
Gong, Xiaoli
Zhao, Yangyu
Zhang, Lizhen
You, Yiping
Wei, Hongwei
Zuo, Xifang
Zhou, Ying
Xing, Xinli
Meng, Zhaoyan
Lv, Qi
Liu, Zhaodong
Zhang, Jian
Hu, Liyan
Li, Junnan
Li, Li
Chen, Chulin
Liu, Chunyan
Sun, Guoqiang
Liu, Aiju
Chen, Jingsi
Lv, Yuan
Wang, Xiaoli
Wei, Yuan
Article History
Received: 10 May 2021
Accepted: 15 September 2021
First Online: 9 October 2021
Declarations
:
: This study was approved by the Peking University Third Hospital Medical Science Research Ethics Committee (No. 2019 No.056–02). All pregnant women gave their informed consent before participation in this study. Research work was performed in accordance with the Helsinki Declaration of 1964 and its later amendments.
: Not applicable.
: The authors declare that they have no competing interests.