Received: 5 February 2021
Accepted: 1 September 2021
First Online: 12 October 2021
: This study was approved by the Biomedical Ethics Committee of Xinxiang Medical University (XYLL-2020235) and Hainan Medical University (HYLL-2020005), complying with the Declaration of Helsinki. All the participants signed online informed consent before completing the online questionnaire.
: Not applicable.
: The authors declare that there are no conflict interests.