Liu, Ying
Li, Tengteng
Guo, Nafei
Jiang, Hui http://orcid.org/0000-0003-1433-4979
Li, Yuehong
Xu, Chenying
Yao, Xiao
Funding for this research was provided by:
Science and Technology Commission of Shanghai Municipality (19DZ2306400)
Shanghai First Maternity and Infant (2017RC08)
Article History
Received: 12 May 2020
Accepted: 11 February 2021
First Online: 19 February 2021
Ethics approval and consent to participate
: Ethical approval was obtained from the hospital Institutional Review Board (Ethics Committee of Shanghai First Maternity and Infant Hospital, No. KS1913). Furthermore written informed consent was obtained from every participant. Participants were assured that the information collected in this study was confidential and anonymous, and their participation was totally voluntary.
: Not applicable.
: The authors declare that they have no competing interests.