Liu, Yanmin
Feng, Xinwei
Tang, Yongxue
Sun, Yanqiu
Pu, Xiaoyan
Feng, Xiaokai
Article History
Received: 17 October 2022
Accepted: 20 February 2023
First Online: 28 February 2023
Declarations
:
: This retrospective study involving human participants was approved by the Research Ethics Board at Qinghai Provincial People’s Hospital, Qinghai University (Ethical number: 2022–28) and was conducted in accordance with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Not applicable.
: The authors declare no competing interests.