Funding for this research was provided by:
National key R&D Program of China (2018YFC2002000 & 2018YFC2002001)
National Natural Science Foundation of China (71573048)
Received: 29 June 2020
Accepted: 28 September 2021
First Online: 9 October 2021
: Informed consent was obtained from all subjects involved in the study. The questionnaire was electronically distributed and consent was obtained by asking the participants to read a box stating “I have read the information and agree to participate in this study” before they could access to the whole questionnaire. The Institutional Review Board of the Fudan University, School of Public Health (IRB#2020-01-0800), approved the ethic protocol.
: Not applicable.
: The author declare that they have no competing interest.