Zhang, Dongdong
Wang, Xue
Zhang, Mingbao
Yin, Yafei
Guo, Jianqiang
Article History
Accepted: 13 July 2022
First Online: 20 July 2022
Declarations
:
: All procedures performed in this study involving human participants were in accordance with the 1964 Helsinki declaration and its later amendments or parable ethical standards. The data used in this retrospective study were obtained from the public database and these data have been anonymously processed. This study was approved by the Ethical Committee and Institutional Review Board of The Second Hospital, Cheeloo College of Medicine, Shandong University.
: The authors declare no competing interests.