Funding for this research was provided by:
Key projects of Chongqing Health Commission (2016ZDXM031)
Article History
Received: 14 September 2020
Accepted: 24 November 2020
First Online: 2 January 2021
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: 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.