Gao, Teng
Song, Xiuju
Du, Huiwen
Nie, Yufeng
Chen, Yubin
Ji, Qingqing
Sun, Jingyu
Yang, Yanlian http://orcid.org/0000-0003-4318-7672
Zhang, Yanfeng
Liu, Zhongfan
Article History
Received: 3 September 2014
Accepted: 3 March 2015
First Online: 14 April 2015
Competing interests
: The authors declare no competing financial interests.