Zhou, Yangwen
Tao, Jing
Wang, Ke
Deng, Kui
Wang, Yanping
Zhao, Jianxin
Chen, Chunyi
Wu, Tingxuan
Zhou, Jiayuan
Zhu, Jun
Li, Xiaohong
Funding for this research was provided by:
the national health commission of the people’s republic of china (No. 2016YFC1000102)
the science & technology department of sichuan province (No. 2019YFS0530)
Article History
Received: 20 July 2021
Accepted: 23 August 2021
First Online: 1 September 2021
Declarations
:
: This study was approved by the Research Ethics Committee of the West China Second Hospital of Sichuan University and registered at the Chinese Clinical Trial Registry (ExternalRef removed, registration number ChiCTR1900022569). Enrolled pregnant women will have sufficient time to consider whether to participate after reading the informed consent form and can discuss their enrolment with their family members. If they are willing to participate in the study, they will be asked to sign an electronic informed consent form. Enrolled pregnant women can withdraw from the survey at any time for any reason.
: Not applicable.
: The authors declare that they have no conflicts of interest.