Yang, Guoyi
Wang, Ling
Wang, Jia
Geng, Zixian
Liu, Huixin
Xu, Tao
Article History
Received: 20 January 2021
Accepted: 4 October 2021
First Online: 18 October 2021
Declarations
:
: This study was approved by Peking University People’s Hospital Ethical Committee [No:2020PHB181–01]. The online survey was anonymous. Informed consent was obtained from all subjects or, if subjects are under 18, from a parent and/or legal guardian when they accessed the online survey.
: Not applicable.
: The authors declare that they have no competing interests.