Haimerl, Michael
Verloh, Niklas
Fellner, Claudia
Zeman, Florian
Teufel, Andreas
Feigl, Stefan Fichtner-
Schreyer, Andreas G.
Stroszczynski, Christian
Wiggermann, Philipp
Article History
Received: 4 March 2014
Accepted: 20 June 2014
First Online: 8 July 2014
Competing interests
: The authors declare no competing financial interests.