Funding for this research was provided by:
National Natural Science Foundation of China (71473129)
Received: 4 September 2020
Accepted: 22 December 2020
First Online: 7 January 2021
Ethics approval and consent to participate
: According to <i>The Ethical Review Policy of Human Biomedical Research</i> issued by China’s former Ministry of Health, ethics approval was unnecessary for our patient survey, because only patient interviews were conducted without any physical, chemical or biological approach [CitationRef removed]. Nevertheless, our research team did follow standard procedures to obtain oral informed consent from each participant before the interview started [CitationRef removed].
: Not applicable.
: The authors (X.W., J.C., Y.Y., B.B., and K.B.) declare that they have no conflicting interests.