Funding for this research was provided by:
The “Three Major” constructions emergency projects for the new coronavirus prevention and control in 2020 of Sun Yat-sen University
Received: 26 February 2020
Accepted: 19 May 2020
First Online: 29 May 2020
Ethics approval and consent to participate
: After consultation, the online survey did not require the approval of the local ethics committee. All participants agreed to participate in the study.
: Not applicable.
: All authors have no conflicts of interest to declare.