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Authors
Li, Yuanyuan
Kong, Qingyao
Yue, Jiping
Gou, Xuewen
Xu, Ming https://orcid.org/0000-0001-9595-834X
Wu, Xiaoyang https://orcid.org/0000-0001-6378-3207
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Article History
Received: 14 September 2017
Accepted: 15 August 2018
First Online: 17 September 2018
Competing interests
: The authors declare no competing interests.
