Yang, Weiming
Liu, Haishun
Zhao, Yucheng
Inoue, Akihisa
Jiang, Kemin
Huo, Juntao
Ling, Haibo
Li, Qiang
Shen, Baolong
Article History
Received: 11 June 2014
Accepted: 11 August 2014
First Online: 29 August 2014
Competing interests
: The authors declare no competing financial interests.