Cai, Haiyuan
Zeng, Yonghui
Funding for this research was provided by:
National Natural Science Foundation of China (31770129)
Natural Science Foundation of Jiangsu Province of China (BK20151612)
Article History
Received: 11 November 2017
Accepted: 21 November 2017
First Online: 2 December 2017
Competing interests
: The authors declare that they have no competing interests.
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