Qin, Su
Liu, Yanli
Tempel, Wolfram
Eram, Mohammad S.
Bian, Chuanbing
Liu, Ke
Senisterra, Guillermo
Crombet, Lissete
Vedadi, Masoud
Min, Jinrong
Article History
Received: 21 December 2013
Accepted: 25 April 2014
First Online: 23 May 2014
Competing interests
: The authors declare no competing financial interests.