Chen, Aiping
Weigand, Marcus
Bi, Zhenxing
Zhang, Wenrui
Lü, Xuejie
Dowden, Paul
MacManus-Driscoll, Judith L.
Wang, Haiyan
Jia, Quanxi
Article History
Received: 24 March 2014
Accepted: 21 May 2014
First Online: 24 June 2014
Competing interests
: The authors declare no competing financial interests.