Xiang, Jin-Feng
Wang, Wen-Quan
Liu, Liang
Xu, Hua-Xiang
Wu, Chun-Tao
Yang, Jing-Xuan
Qi, Zi-Hao
Wang, Ya-Qi
Xu, Jin
Liu, Chen
Long, Jiang
Ni, Quan-Xing
Li, Min
Yu, Xian-Jun
Article History
Received: 24 September 2015
Accepted: 9 December 2015
First Online: 12 January 2016
Change Date: 13 May 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.