Funding for this research was provided by:
Natural Science Fund of China (61378058, 61575070, 11774103)
Fujian Province Science Fund for Distinguished Young Scholars (2015J06015)
Promotion Program for Young and Middle-Aged Teachers in Science and Technology Research of Huaqiao University (ZQN-YX203)
Text and Data Mining valid from 2018-04-20
Received: 26 January 2018
Accepted: 16 April 2018
First Online: 20 April 2018
: The authors declare that they have no competing interests.
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