Funding for this research was provided by:
National Natural Science Foundation of China (61831002,61401053)
Innovation Project of the Common Key Technology of Chongqing Science and Technology Industry (cstc2018jcyjAX0383)
Text and Data Mining valid from 2020-02-05
Received: 29 July 2019
Accepted: 16 January 2020
First Online: 5 February 2020
: The authors declare that they have no competing interests.