Liu, Shuxun
Yi, Lin
Ling, Ma
Jiang, Jinxia
Song, Lijun
Liu, Juan
Cao, Xuetao
Article History
Received: 2 April 2016
Revised: 11 May 2016
Accepted: 11 May 2016
First Online: 27 June 2016
Change Date: 26 November 2019
Change Type: Correction
Change Details: "An amendment to this paper has been published and can be accessed via a link at the top of the paper."
Competing interests
: The authors declare no conflict of interest.