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Authors
Kim, Sangtae
Choi, Soon Ju
Zhao, Kejie
Yang, Hui http://orcid.org/0000-0002-2628-4676
Gobbi, Giorgia
Zhang, Sulin
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Article History
Received: 13 March 2015
Accepted: 6 November 2015
First Online: 6 January 2016
Competing interests
: The authors declare no competing financial interests.
