Funding for this research was provided by:
Key Research and Development Project of Jiangxi Province (S2017YBYFE0168)
Text and Data Mining valid from 2019-02-09
Received: 5 November 2018
Accepted: 23 January 2019
First Online: 9 February 2019
Compliance with Ethical Standards
: Wei Luo declares that she has no conflict of interest. Hailiang Zhang declares that he has no conflict of interest. Xuemei Liu declares that she has no conflict of interest.
: This article has no any study with human participants or animals by any of the authors.
: Not applicable.