Funding for this research was provided by:
National Natural Science Foundation of China (82070782)
Article History
Received: 7 April 2022
Accepted: 20 July 2022
First Online: 28 July 2022
Declarations
:
: The Ethics Committee of Shandong Provincial Hospital approved the study protocol (NO.2020-919). All procedures performed in studies involving human participants were in accordance with the ethical standards of the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The Ethics Committee of Shandong Provincial Hospital waived the requirement for informed consent because of the retrospective design of this study.
: Not applicable.
: The authors declare no conflict of interest.