Ouyang, Kunfu
Leandro Gomez-Amaro, Rafael
Stachura, David L.
Tang, Huayuan
Peng, Xiaohong
Fang, Xi
Traver, David
Evans, Sylvia M.
Chen, Ju
Article History
Received: 9 January 2014
Accepted: 25 July 2014
First Online: 12 September 2014
Competing interests
: The authors declare no competing financial interests.