Funding for this research was provided by:
Cardiovascular Multidisciplinary Integrated Research Fund (CIMF- Z-2016-23-2001-04)
The Project of Open Online Courses of Peking Union College (PUMC-POCP-2020-08)
Received: 29 December 2021
Accepted: 3 May 2022
First Online: 26 May 2022
: All procedures followed were in accordance with the ethical standards of the responsible institutional committee on human experimentation and with the Helsinki Declaration of 1975 (revised in 2000). The study protocol was approved by the ethics committee of the institutional review board at Peking Union Medical College Hospital (PUMCH). A questionnaire and a list of open-ended questions for interviews were designed in Chinese. Potential participants were invited to participate in this study, and only those who signed the informed consent online could participate in this study.
: Not applicable.
: The authors declare that they have no competing interests.