Funding for this research was provided by:
Teacher Support Fund of Jining Medical University (JY2017RW001)
Text and Data Mining valid from 2020-04-06
Received: 12 August 2019
Accepted: 25 March 2020
First Online: 6 April 2020
Ethics approval and consent to participate
: Our research group submitted the application materials to Medical Ethics Committee of West China School of Public Health and West China Fourth Hospital. Based on the principles of informed consent and privacy protection, the expert group reviewed the ethical application and thought that this study did not involve the intervention and the collection of human biological samples, and that individuals could not be tracked based on the data contained in the study, therefore, the expert group approved that this study could collect data on the basis of the oral consent of the respondents. The research group did follow the standard procedure carefully to obtain the oral informed consent of the respondents. Prior to the on-site questionnaire survey, each respondent was informed that his / her participation was voluntary and anonymous. Each respondent was also informed that he / she had the right to refuse to participate and the right to terminate participation at any time during the survey. A total of 96 questionnaires of the respondents who dropped out of the survey were destroyed in their presence.
: Not applicable.
: The authors declare that they have no competing interests.