Updates are available Erratum dated 2015-06-26
Click to view Erratum: https://doi.org/10.1038/am.2015.59
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Authors
Yang, Zhongqiang
Liu, Huajie
Liu, Dongsheng
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Article History
Received: 22 July 2014
Revised: 17 November 2014
Accepted: 30 November 2014
First Online: 27 February 2015
Competing interests
: The authors declare no conflict of interest.
