Received: 17 April 2021
Accepted: 5 October 2021
First Online: 21 October 2021
: Ethics approval for the study was given by the ethics committee of Hebei University of Chinese Medicine, and all protocols were carried out in accordance with the Declaration of Helsinki. Students were informed of the purpose of the study, and if they were willing to participate, they signed the informed consent form and filled out the questionnaire. The confidentiality and privacy of the participants were maintained.
: Not applicable.
: The authors declare that there are no conflicts of interest.