Xiong, Haitao
Guo, Bingxiu
Gan, Zhenshun
Song, Deguang
Lu, Zeqing
Yi, Hongbo
Wu, Yueming
Wang, Yizhen
Du, Huahua
Article History
Received: 20 January 2016
Accepted: 15 May 2016
First Online: 27 May 2016
Competing interests
: The authors declare no competing financial interests.