Funding for this research was provided by:
National Natural Science Foundation of China (National Natural Science Foundation of China (21675028, 21575027, 21507041 and 21575025), Nature Sciences Funding of Fujian Province (2018J01682), STS Key Project of Fujian Province (2017T3007), the cooperative project of production and study in University of Fujian Province (2018Y4007), and the Program for Changjiang Scholars and Innovative Research Team in University (IRT_15R11))
Text and Data Mining valid from 2019-03-29
Received: 13 November 2018
Accepted: 8 March 2019
First Online: 29 March 2019
Compliance with ethical standards
: The author(s) declare that they have no competing interests.