Yan, Zhang
Hui, Lin
Wenbin, Jiang
Liuxue, Lu
Yuemei, Li
Bohan, Lv
Lili, Wei
Article History
Received: 11 August 2021
Accepted: 29 November 2021
First Online: 14 December 2021
Declarations
:
: Ethical review and approval were performed by Medical Ethics Committee of Affiliated Hospital of Qingdao University. The informed consent obtained from participants by reading the contents of the current survey and choosing the option “I agree” voluntarily. All the completed questionnaires were kept confidential and the methods were carried out in accordance with STROBE Statement.
: Not applicable.
: The authors declare that they have no competing interests.