Funding for this research was provided by:
National Natural Science Foundation of China (81673139)
Article History
Received: 7 September 2020
Accepted: 15 March 2021
First Online: 22 April 2021
Declarations
:
: This study was approved by the Medical Ethics Committee of the School of Public Health, Tongji Medical College. All participants provided written informed consents before enrollment.
: Not applicable.
: The authors declare that they have no conflict of interest.