Ying, Changtian
Huang, Zhen
Ying, Changyan
Funding for this research was provided by:
National Natural Science Foundation of China (61262088, 61462079, 61562086)
Article History
Received: 30 July 2018
Accepted: 18 September 2018
First Online: 1 October 2018
Competing interests
: The authors declare that they have no competing interests.
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