Claus, Stephanie
Puscalau-Girtu, Ioana
Walther, Paul
Syrovets, Tatiana
Simmet, Thomas
Haupt, Christian
Fändrich, Marcus
Article History
Received: 19 December 2016
Accepted: 2 March 2017
First Online: 31 March 2017
Competing interests
: The authors declare no competing financial interests.