Lin, Xiaosi
Yang, Ting
Wang, Shicong
Wang, Zhen
Yun, Ye
Sun, Lixiang
Zhou, Yunhe
Xu, Xiaohui
Akazawa, Chihiro
Hong, Wanjin
Wang, Tuanlao
Article History
Received: 31 October 2013
Accepted: 13 November 2014
First Online: 2 December 2014
Change Date: 15 July 2015
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.