Funding for this research was provided by:
National Key Research and Development Program of China (2018YFC2002000&2018YFC2002001)
Article History
Received: 8 August 2019
Accepted: 31 August 2020
First Online: 26 October 2020
Ethics approval and consent to participate
: Ethical approval was obtained from the Ethics Committee for Medical Research at the School of Public Health, Fudan University. All participants provided written consent to participate.
: Not applicable.
: All of the authors have no conflict of interest to declare.