Funding for this research was provided by:
National Natural Science Foundation of China (61564010, U1304108, 11304273)
Applied Basic Research Foundation of Yunnan Province (2013FA035, 2014FD017)
Yunnan Provincial Science and Technology Department (2012HA007)
Text and Data Mining valid from 2018-04-27
Received: 23 October 2017
Accepted: 16 April 2018
First Online: 27 April 2018
: The authors declare that they have no competing interests.
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