Liu, Peng
Ding, Yue
Fu, Tingting
Shen, Xingfa
Li, Jianjiang
Funding for this research was provided by:
National Natural Science Foundation of China (61601157)
National Natural Science Foundation of China (61672198)
Article History
Received: 2 December 2017
Accepted: 1 May 2018
First Online: 24 May 2018
Competing interests
: The authors declare that they have no competing interests.
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