Liao, Pingping
Zhao, Shuo
Lyu, Lin
Yi, Xuanlong
Ji, Xiangyu
Sun, Jian
Jia, Yanfang
Zhou, Zangong
Funding for this research was provided by:
National Natural Science Foundation of China (81902001)
Article History
Received: 18 July 2020
Accepted: 14 October 2020
First Online: 2 November 2020
Ethics approval and consent to participate
: This retrospective study was exempted from the Institutional Review Board of the Ethics Committee of the Affiliated Hospital of Qingdao University because these was no modified intervention or disclosure of personal information and the informed consent from patients was waived.
: Not applicable.
: The authors declare that they have no competing interests.