Funding for this research was provided by:
National Natural Science Foundation of China (21401086, 21401087)
Natural Science Foundation of Jiangsu Province (BK20180105)
Text and Data Mining valid from 2019-09-25
Received: 27 February 2018
Accepted: 9 September 2019
First Online: 25 September 2019
: The authors declare no competing interests.