Tian, Wenxia
Yan, Wenqing
Liu, Yang
Zhou, Fangfang
Wang, Haixia
Sun, Wenguang http://orcid.org/0000-0002-1808-8106
Funding for this research was provided by:
the Scientific Research Fund of the Shanghai Municipal Commission of Health and Family Planning (201640250;2019ZB0104)
Article History
Received: 19 November 2020
Accepted: 10 January 2021
First Online: 18 January 2021
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: The study was approved by the Ethics Committee of Shanghai Sixth People’s Hospital East Campus (no.2016-003). The pregnant women provided written consent and received written information about the study.