Funding for this research was provided by:
Zhejiang University special scientific research fund for COVID-19 prevention and control (K920330111)
Received: 7 August 2020
Accepted: 4 April 2021
First Online: 26 April 2021
: The protocol for collection of information from participants was approved by the ethics committee of Southern Medical University (Guangzhou, China). This protocol was undertaken in accordance with the ethical standards noted in the 1964 Declaration of Helsinki and its later amendments. Participants provided written informed consent before completing the online questionnaire.
: Not applicable.
: The authors declare that they have no competing interests.