Funding for this research was provided by:
National Natural Science Foundation of China (NO.81873828, NO.81771566)
Received: 7 July 2020
Accepted: 2 October 2020
First Online: 16 October 2020
Ethics approval and consent to participate
: Not applicable. Ethical approval was not required as this research was conducted on previously collected non-identifiable information.
: All the authors and the Chongqing medical University consented to publish the study in your Journal.
: The authors have no conflict of interest to declare.