Funding for this research was provided by:
Foundation for the National Institutes of Health (R34MH119963, 1R01AI114310-01, R34MH109359)
National Natural Science Foundation of China (81903371)
National Key Research and Development Program of China (2017YFE0103800)
Received: 11 May 2020
Accepted: 1 November 2020
First Online: 17 November 2020
Ethics approval and consent to participate
: This protocol has been developed in accordance to the SPIRIT Checklist (see Additional file InternalRef removed). Institutional Review Board (IRB) approval has been obtained from School of Public Health, Shandong University on 6 March 2019 (20190210). All participants will provide consent prior to taking part in the study.
: Not applicable.
: The authors declare that they have no competing interests.