Funding for this research was provided by:
Key Technologies Research and Development Program (2018YFC1314700)
National Natural Science Foundation of China (91849126)
Shanghai Municipal Science and Technology Major Project (2018SHZDZX01)
Text and Data Mining valid from 2020-04-10
Received: 14 January 2020
Accepted: 2 April 2020
First Online: 10 April 2020
Ethics approval and consent to participate
: The study was conducted in accordance with the Helsinki Declaration. Informed consent was obtained from the patients. The Institutional Review Board of Qingdao Municipal Hospital approved the study.
: Not applicable.
: The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.