Chi, Runze
Shan, Xiaoli
Guan, ChunPing
Yang, Hao
Wang, Xiangkun
Li, Bingong
Zhang, Qing
Article History
Received: 28 April 2023
Accepted: 16 July 2023
First Online: 28 July 2023
Declarations
:
: The authors claim to have no conflicts of interest.
: The Ethics Committee of Qingdao Municipal Hospital has granted its approval for this study. All procedures involving human participants in this study followed the ethical standards of the institutional and/or national research committees, the 1964 Helsinki Declaration, and its subsequent revisions, or similar ethical standards. Since this was a retrospective study that did not violate patient privacy, the Ethics Committee of Qingdao Municipal Hospital approved the exemption of informed consent.
: Not applicable.