Funding for this research was provided by:
National Natural Science Foundation of China (61771297)
Fundamental Research Funds for the Central Universities (GK201802013, GK201803062)
Text and Data Mining valid from 2019-12-02
First Online: 2 December 2019
Compliance with ethical standards
: This manuscript has not been published and is not under consideration for publication elsewhere. We have no conflicts of interest to disclose. Both authors have read and approved the final version of the manuscript.