Funding for this research was provided by:
Shanghai Public Health Key Discipline Plan (12GWZX0901, 15GWZK1001)
Received: 2 December 2019
Accepted: 23 September 2020
First Online: 6 September 2021
Ethics approval and consent to participate
: Ethical approval to conduct this study was granted by the Medical Research Ethics Committee of the School of Public Health, Fudan University (The international registry Nos. IRB00002408, FWA00002399). All participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.