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Authors
Zhang, Bei https://orcid.org/0000-0003-4464-9939
Han, Siqi
Feng, Bing
Chu, Xiaoyuan
Chen, Longbang
Wang, Rui
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Article History
Received: 18 June 2016
Revised: 3 November 2016
Accepted: 14 November 2016
First Online: 10 February 2017
Competing interests
: The authors declare no conflict of interest.
