Funding for this research was provided by:
National Natural Science Foundation of China (61274088)
Postdoctoral Research Foundation of China
National Key Technologies R&D Program of China (2015ZX02102-003)
Text and Data Mining valid from 2019-02-11
Received: 30 November 2018
Accepted: 21 January 2019
First Online: 11 February 2019
: The authors declare that they have no competing interests.
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