Pan, Minghao
Gao, Wei
Article History
Received: 2 January 2021
Accepted: 4 March 2021
First Online: 12 March 2021
Declarations
:
: This study conformed to the principles outlined in the Declaration of Helsinki. Ethical approval was obtained from the Medical Ethics Committee of Shandong University (code: 2018-R-017). All participants provided informed consent before fill in the online questionnaire.
: Not applicable.
: No potential conflict of interest was reported by the authors.