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Article History

Received: 25 June 2020

Accepted: 26 October 2020

First Online: 4 November 2020

Ethics approval and consent to participate

: Ethical approval of this study was obtained from the Medical Ethics Committee of West China Second University Hospital, Sichuan University (YXKY2020LSP(094)). Research proposal including questionnaire and procedure of verbal consent were reviewed and approved by the Medical Ethics Committee of West China Second University Hospital, Sichuan University prior to the start of this study. Purpose and significance of study was presented at the beginning of the questionnaire. This was investigation research, and this study was conducted based on the online questionnaires which were voluntarily and anonymously completed by participants, therefore, the Medical Ethics Committee of West China Second University Hospital, Sichuan University felt the need for written consent was not necessary for this study. Participants were required to complete the questionnaire voluntarily but were not required to identify themselves by writing their names on the questionnaire. Therefore, the completion of the questionnaire was regarded as verbal consent. Verbal consent was obtained from all study participants. All data collected were confidential and used only by this study.

: Not applicable.

: The authors declare that they have no competing interests.