Duan, Wei
Zhang, Guoan
Sun, Qiang
Hou, Jia
Ji, Yancheng
Choi, Jeaho
Funding for this research was provided by:
National Natural Science Foundation of China (61371113)
National Natural Science Foundation of China (61401241)
Article History
Received: 4 January 2018
Accepted: 4 June 2018
First Online: 28 June 2018
Competing interests
: The authors declare that they have no competing interests.
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