Funding for this research was provided by:
Shanghai Municipal Health Bureau (15GWZK0402, GWV-10.1-XK08)
Article History
Received: 28 May 2021
Accepted: 30 October 2021
First Online: 13 November 2021
Declarations
:
: This study was approved by the Ethics Committee of School of Public Health, Fudan University (IRB#2016-11-0604). The objectives of the study were explained to the participants and they were consent informed before participation.
: Not applicable.
: The authors declare that they have no competing interest.