Funding for this research was provided by:
The project was supported by grants from National Key R & D Plan, P. R. China (2017YFD060030304)
The Provincial Fundation of Guizhou Province, P. R. China (2019-1014)
The Opening Foundation of Key Laboratory of Educational Ministry, P. R. China (2018-474)
Text and Data Mining valid from 2020-01-16
First Online: 16 January 2020
Compliance with Ethical Standards
: The authors declared that no conflicts of interest to this work. We declare that we do not have any commercial or associative interest that represents a conflict of interest in connection with the work submitted.