Gerstl, Matthias P.
Ruckerbauer, David E.
Mattanovich, Diethard
Jungreuthmayer, Christian
Zanghellini, Jürgen
Article History
Received: 27 October 2014
Accepted: 11 February 2015
First Online: 10 March 2015
Competing interests
: The authors declare no competing financial interests.