Li, Ying
Guo, Wei
Han, Shushu
Kong, Fanli
Wang, Chengdong
Li, Desheng
Zhang, Heming
Yang, Mingyao
Xu, Huailiang
Zeng, Bo
Zhao, Jiangchao
Article History
Received: 3 October 2014
Accepted: 1 April 2015
First Online: 18 May 2015
Change Date: 30 June 2015
Change Type: Update
Change Details: The HTML version of this Article previously published omitted Ying Li as a corresponding author. This has now been corrected in the HTML; the PDF version of the paper was correct from the time of publication.
Competing interests
: The authors declare no competing financial interests.