Wang, Yao
Xiao, Juan
Hong, Fanzhen
Article History
Received: 17 November 2021
Accepted: 18 April 2022
First Online: 30 April 2022
Declarations
:
: All the procedures complied with the principles of the Declaration of Helsinki and were approved by the Ethics Committee of the Second Hospital of Shandong University. The requirement for informed consent was waived by the Ethics Committee because of the retrospective nature of the study.
: Not applicable.
: The authors declare that they have no competing interests.