Funding for this research was provided by:
Natural Science Foundation of Guangdong Province (No. 2016A030313554)
Received: 12 June 2020
Accepted: 17 November 2020
First Online: 28 November 2020
Ethics approval and consent to participate
: The study protocol was granted approval by the ethics review board of Nanfang Hospital, Southern Medical University. We obtained verbal consent from all subjects prior to collecting data from this study.
: Not applicable.
: The authors have no competing interest to declare.