Funding for this research was provided by:
Chongqing Municipal Public Health Bureau, Chongqing People's Municipal Government (2019ZDXM003)
Received: 3 May 2020
Accepted: 13 October 2020
First Online: 20 October 2020
Ethics approval and consent to participate
: The study protocol has been approved by the Ethics committee of the First Affiliated Hospital of Third Military Medical University, PLA (2015). All patients signed an informed consent form and volunteered to participate in this study.
: Not Applicable.
: The authors of this article declared they have no conflict of interests.