Marxen, Sandra
Stark, Timo D.
Rütschle, Andrea
Lücking, Genia
Frenzel, Elrike
Scherer, Siegfried
Ehling-Schulz, Monika
Hofmann, Thomas
Article History
Received: 10 March 2015
Accepted: 22 April 2015
First Online: 27 May 2015
Competing interests
: The authors declare no competing financial interests.