Funding for this research was provided by:
National Natural Science Foundation of China (11705030, 11674060, 11774058)
Natural Science Foundation of Fujian Province (2017J05005, 2016J01018)
Text and Data Mining valid from 2020-01-06
Received: 10 November 2019
Accepted: 23 December 2019
First Online: 6 January 2020
: The authors declare that they have no competing interests.