Funding for this research was provided by:
National Natural Science Foundation of China (81500462)
the SciTech Research Development Program of Guangzhou City (158100076)
Received: 5 May 2020
Revised: 5 June 2020
Accepted: 23 June 2020
First Online: 10 July 2020
Ethics approval and consent to participate
: This is a retrospective cohort study. This procedure used in this study adhered to the tenets of the Declaration of Helsinki, and informed consent was obtained from all patients. The study was approved by the Human Ethics Committee of The Third Affiliated Hospital of Sun Yat-sen University.
: Not applicable.
: The 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.The authors also declare that they have no non-financial conflict of interest.