Funding for this research was provided by:
National Natural Science Foundation of China (31470787, 21708003)
Science and Technology Research Project of Jilin Province (20170519015JH)
Text and Data Mining valid from 2019-01-24
Received: 7 October 2018
Revised: 1 January 2019
Accepted: 6 January 2019
First Online: 24 January 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.