Funding for this research was provided by:
Nature Science Foundation of Ningbo (2016A610181, 2018A610403)
Ningbo Medical and Health Branding Discipline (PPXK2018-10)
Article History
Received: 30 March 2021
Accepted: 7 July 2021
First Online: 14 July 2021
Declarations
:
: All the authors state that there is no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The study was conducted in accordance with the Declaration of Helsinki, and the protocol was approved by ethics committee of Ningbo Center for Disease Control and Prevention (NO. 201703).
: Informed consent was obtained from all individual participants included in the study.