Zhao, Rui
Miao, Wei
Li, Baohua
Article History
Received: 20 January 2022
Accepted: 5 April 2022
First Online: 28 April 2022
Declarations
:
: This is an observational study. The Dingxi People’s Hospital Research Ethics Committee has confirmed that no ethical approval is required.
: Informed consent was obtained from all individual participants included in the study.
: The authors declare that they have no competing interests.