Wang, Hui
Liu, Ting
Huang, Yingzhou
Fang, Yurui
Liu, Ruchuan
Wang, Shuxia
Wen, Weijia
Sun, Mengtao
Article History
Received: 28 August 2014
Accepted: 29 October 2014
First Online: 18 November 2014
Competing interests
: The authors declare no competing financial interests.