Liu, Bei
Chen, Song-Chang
Yang, Yan-Mei
Yan, Kai
Qian, Ye-Qing
Zhang, Jun-Yu
Hu, Yu-Ting
Dong, Min-Yue
Jin, Fan
Huang, He-Feng
Xu, Chen-Ming
Article History
Received: 7 April 2015
Accepted: 30 October 2015
First Online: 3 December 2015
Change Date: 23 February 2016
Change Type: Update
Change Details: A correction has been published and is appended to both the HTML and PDF versions of this paper. The error has not been fixed in the paper.
Competing interests
: The authors declare no competing financial interests.