Funding for this research was provided by:
National Major Science and Technology Projects of China ((2018ZX10302104))
Received: 29 August 2020
Accepted: 23 November 2020
First Online: 4 December 2020
Ethics approval and consent to participate
: The present study was approved by the institutional review board of the Chongqing Public Health Medical Center (No. 2019–003-02-KY). The institutional review board waived the requirement for written informed consent, since the present study was retrospective, and all patient data were analyzed in anonymity.
: Not applicable.
: All authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.