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Authors
Ni, Qicheng https://orcid.org/0000-0002-9033-9328
Gu, Yanyun
Xie, Yun
Yin, Qinglei
Zhang, Hongli
Nie, Aifang
Li, Wenyi
Wang, Yanqiu
Ning, Guang
Wang, Weiqing
Wang, Qidi
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Article History
Received: 21 July 2016
Accepted: 26 April 2017
First Online: 9 June 2017
Competing interests
: The authors declare no competing financial interests.
