Funding for this research was provided by:
National Natural Science Foundation of China (72004242)
Received: 28 January 2022
Accepted: 2 June 2022
First Online: 25 June 2022
: The present study used de-identified secondary data and was approved by the Ethical Review Board of Sun Yat-sen University School of Public Health (Shenzhen).
: Not applicable.
: Dr. Zhaojia Ye claimed no conflict of interest related to the work under consideration for publication. Dr. Yawen Jiang reported receiving grants from the National Natural Science Foundation of China.