Funding for this research was provided by:
National Natural Science Foundation of China (31400037)
Text and Data Mining valid from 2019-06-15
Received: 2 January 2019
Accepted: 31 May 2019
First Online: 15 June 2019
: This article does not contain any studies with human participants or animals performed by any of the authors.
: Not applicable.
: The authors declare that they have on competing interest.