Funding for this research was provided by:
Medical Scientific Research Foundation of Zhejiang Province (2018KY809)
Technology Bureau Program of Jiaxing, Zhejiang Province (2020AD300035)
Received: 14 August 2020
Accepted: 19 January 2021
First Online: 26 January 2021
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of Jiaxing Maternal and Child Health Hospital. All participants gave their informed consent in this study.
: Not applicable.
: The authors have no conflicts of interest to declare.