Yang, Jing
Wei, Yuan
Qi, Hongbo
Yin, Nanlin
Yang, Yang
Li, Zailing
Xu, Lili
Wang, Xueju
Yuan, Pengbo
Li, Luyao
Han, Ting-Li
Zhao, Yangyu
Funding for this research was provided by:
National Nature Science Foundation of China (81871185, 81961128004)
Health Commmision of Chongqing (2018ZDXM024)
National Nature Science Fundation of China (81520108013, 81771613, 81671488,)
Minisry of Science and Technology (2016YFC1000408)
Article History
Received: 5 November 2019
Accepted: 20 March 2020
First Online: 1 May 2020
Ethics approval and consent to participate
: This research was conducted in accordance with the Declaration of Helsinki and approved by the Ethical Committee of Peking University Third Hospital.
: Informed consent was signed by each pregnant participant included in this study.
: The authors declare that they have no competing interests.