Funding for this research was provided by:
the Scientific Research Foundation of Ministry of Public Health of China (WKJ2014-2-021)
Heath and Family Planning Commission of Zhejiang Province (2019ZD060)
Public Project of Science Technology Department of Zhejiang Province of China (2015C33254)
Article History
Received: 18 May 2021
Accepted: 21 July 2021
First Online: 28 July 2021
Declarations
:
: LX, SL and YZ declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.