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Authors
Zhang, Jianzhong
Ren, Dunqiang
Cao, Xue
Wang, Tao
Geng, Xue
Li, Xin
Tang, Jinglong
Leng, Shuguang
Wang, Hongmei
Zheng, Yuxin
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (91943301, 91643203, 81872600)
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Article History
Received: 31 July 2020
Accepted: 14 December 2020
First Online: 7 January 2021
Ethics approval and consent to participate
: This research was approved by the Ethics committee of the department of medicine at Qingdao University. The informed consent was not needed from the participants as only the de-identified data were extracted from the hospital.
: Not applicable.
: The authors declare that they have no competing interests.
