Funding for this research was provided by:
Guangdong Science and Technology Department (2017B010110012)
National Natural Science Foundation of China (81972110)
Received: 19 April 2020
Accepted: 20 July 2020
First Online: 22 July 2020
Ethics approval and consent to participate
: The Medical Ethical Commottee of Nanfang Hospital, Southern Medical University approved this retrospective study with waiver of informed consent.
: Not applicable.
: The authors declare that they have no competing interests.