Li, Zhan
Wang, Chunmei
Tian, Longlong
Bai, Jing
Yao, Huijun
Zhao, Yang
Zhang, Xin
Cao, Shiwei
Qi, Wei
Wang, Suomin
Shi, Keliang
Xu, Youwen
Mingliang, Zhang
Liu, Bo
Qiu, Hongdeng
Liu, Jie
Wu, Wangsuo
Wang, Xiaoli
Wenzhen, An
Article History
Received: 17 November 2014
Accepted: 7 April 2015
First Online: 19 May 2015
Change Date: 31 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.