Liedmann, Swantje
Hrincius, Eike R.
Guy, Cliff
Anhlan, Darisuren
Dierkes, RĂ¼diger
Carter, Robert
Wu, Gang
Staeheli, Peter
Green, Douglas R.
Wolff, Thorsten
McCullers, Jonathan A.
Ludwig, Stephan
Ehrhardt, Christina
Article History
Received: 1 April 2014
Accepted: 23 October 2014
First Online: 9 December 2014
Competing interests
: The authors declare no competing financial interests.