Hou, Bo
Jia, Xuewen
Deng, Ziwen
Liu, Xin
Liu, Huitang
Yu, Haichu
Liu, Shiguo
Funding for this research was provided by:
Natural Science Foundation of Shandong Province (ZR2019MH127)
Article History
Received: 27 December 2019
Accepted: 17 June 2020
First Online: 25 September 2020
Ethics approval and consent to participate
: All participants were provided with an explanation of the research and then gave written informed consent. Our study was approved by the ethics committee of the Affiliated Hospital of Qingdao University.
: Not applicable.
: The author declares that he/she has no competing interests.