Funding for this research was provided by:
National Natural Science Foundation of China (81772428)
Clinical Research Startup Program of Southern Medical University by High-level University Construction Funding of Guangdong Provincial Department of Education (LC2016ZD032)
Received: 26 December 2019
Accepted: 26 February 2020
First Online: 4 March 2020
Ethics approval and consent to participate
: This retrospective study was approved and consented to participate by the Ethics Committee of The Third Affiliated Hospital of Southern Medical University.
: Not applicable.
: The authors declare that they have no competing interests.