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Authors
Lin, Ying
Sibanda, Vusumuzi Leroy
Zhang, Hong-Mei
Hu, Hui
Liu, Hui
Guo, An-Yuan
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Article History
Received: 28 January 2015
Accepted: 16 March 2015
First Online: 13 April 2015
Competing interests
: The authors declare no competing financial interests.
