Ding, Liping
He, Shulian
Miao, Shiding
Jorgensen, Matthew R.
Leubner, Susanne
Yan, Chenglin
Hickey, Stephen G.
Eychmüller, Alexander
Xu, Jinzhang
Schmidt, Oliver G.
Article History
Received: 2 January 2014
Accepted: 25 March 2014
First Online: 15 April 2014
Competing interests
: The authors declare no competing financial interests.