Nie, Pei
Yang, Guangjie
Guo, Jian
Chen, Jingjing
Li, Xiaoli
Ji, Qinglian
Wu, Jie
Cui, Jingjing
Xu, Wenjian
Funding for this research was provided by:
National Natural Science Foundation of China (81701688, 81601527, 81671658)
Natural Science Foundation of Shandong Province (ZR2017BH096)
Key Research and Development Project of Shandong Province (2018GSF118078)
Postdoctoral Science Foundation of China (2018M642617)
Article History
Received: 17 December 2019
Accepted: 19 February 2020
First Online: 24 February 2020
Ethics approval and consent to participate
: This retrospective study was approved by the Institutional Review Board of the Affiliated Hospital of Qingdao University, and the requirement for informed consent was waived.
: Not applicable.
: The authors declare that they have no competing interest.