Funding for this research was provided by:
National Natural Science Foundations of China (8112097)
Article History
Received: 3 October 2020
Accepted: 13 January 2021
First Online: 22 January 2021
Declarations
:
: The authors declare that they have no conflict of interest.
: This study received approval from the School of Public Health Ethics Committee, Sun Yat-sen University. Informed consent was obtained from all individual participants included in the study.