Funding for this research was provided by:
National Natural Science Foundation of China (81971949)
Major Science and Technology Special Project of China (2017ZX09304016)
Clinical Research Startup Program of Southern Medical University by High-level University Construction Funding of Guangdong Provincial Department of Education (LC2016PY003)
Received: 1 July 2020
Accepted: 3 December 2020
First Online: 2 January 2021
Ethics approval and consent to participate
: The study was approved by the clinical research ethics committee of Nanfang Hospital of Southern Medical University. This was a retrospective study that did not need informed consent.
: Not applicable.
: The authors declare that they have no competing interests.