Funding for this research was provided by:
Key Technologies Research and Development Program (2016YFC1401004)
Young Scientists Fund (41706010)
Science and Technology Program of Qingdao (17-3-3-20-nsh)
CERNET Innovation Project (NGII20170416)
Fundamental Research Funds for the Central Universities of China
National Natural Science Foundation of China (NSFC) (61876155)
Text and Data Mining valid from 2019-08-24
Received: 18 April 2019
Accepted: 14 August 2019
First Online: 24 August 2019
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study.