Hao, Ge-Fei
Yang, Sheng-Gang
Huang, Wei
Wang, Le
Shen, Yan-Qing
Tu, Wen-Long
Li, Hui
Huang, Li-Shar
Wu, Jia-Wei
Berry, Edward A.
Yang, Guang-Fu
Article History
Received: 25 March 2015
Accepted: 28 July 2015
First Online: 26 August 2015
Competing interests
: The authors declare no competing financial interests.